Mark the letter A, B, C or D on your answer sheet to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions.

Mark the letter A, B, C or D on your answer sheet to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions

Mark the letter A, B, C or D on your answer sheet to indicate the word that differs from the other three in the position of primary stress in each of the following questions.

Mark the letter A, B, C or D on your answer sheet to indicate the word that differs from the other three in the position of primary stress in each of the following questions.

Mark the letter A,B,C or D on your answer sheet to indicate the correct answer to each of the followingquestions.

St. Catherine’s Monastery Library in Egypt is the first in the world ________ in the sixth century.

Mark the letter A,B,C or D on your answer sheet to indicate the correct answer to each of the followingquestions.

Today’s weather will be a ________ of yesterday.

Mark the letter A,B,C or D on your answer sheet to indicate the correct answer to each of the followingquestions.

The ________ polluted atmosphere in some industrial regions is called “smog”

Mark the letter A,B,C or D on your answer sheet to indicate the correct answer to each of the followingquestions.

Too many factories dispose ________ their waste by pumping it into rivers and the sea.

Mark the letter A,B,C or D on your answer sheet to indicate the correct answer to each of the followingquestions.

He was so mean that he could not bear to ________ the smallest sum of money for the charity appeal.

Mark the letter A,B,C or D on your answer sheet to indicate the correct answer to each of the followingquestions.

Judie performed very well in writing lesson. Her teacher is paying her a compliment.

Teacher: “Judie, you’ve written a much better essay this time.”

Judie: “________.”

Mark the letter A,B,C or D on your answer sheet to indicate the correct answer to each of the followingquestions.

________ gene in the human genome were more comletely understood, many human diseases could be cured or prevented.

Mark the letter A,B,C or D on your answer sheet to indicate the correct answer to each of the followingquestions.

Unlike the other Asian states, Singapore has hardly any raw materials, ________

Mark the letter A,B,C or D on your answer sheet to indicate the correct answer to each of the following questions.

Although the patient’s condition is serious, she seems to be out of ________ 

Mark the letter A,B,C or D on your answer sheet to indicate the correct answer to each of the following questions.

Yuki and Hana are having a free afternoon. Yuki is inviting Hana to see a new movie with him.

Yuki: “Do you feel like going to the cinema this afternoon?”

Hana: : ________.”

Mark the letter A,B,C or D on your answer sheet to indicate the correct answer to each of the following questions.

They appreciate ________ this information

Mark the letter A,B,C or D on your answer sheet to indicate the correct answer to each of the following questions.

The sports event was ________ and successfully organized.

Mark the letter A,B,C or D on your answer sheet to indicate the correct answer to each of the following questions.

The child who was caught ________ wasmade to stand in the corner of the classroom.

Mark the letter A,B,C or D on your answer sheet to indicate the correct answer to each of the following questions.

They are conducting a wide ________ of surveys throughout Vietnam.

Mark the letter A,B,C or D on your answer sheet to indicate the word(s) OPPOSITE in meaning to the underlined word(s) in each of the following questions.

What were the key elements of American foreign policy prior to World War II?

Mark the letter A,B,C or D on your answer sheet to indicate the word(s) OPPOSITE in meaning to the underlined word(s) in each of the following questions.

The flowerig pebble is a plant that looks like a stone and grows in arid areas.

Mark the letter A,B,C or D on your answer sheet to indicate the word(s) CLOSET  in meaning to the underlined word(s) in each of the following questions.

Woman lierated from child care can pursue their own interest.

Mark the letter A,B,C or D on your answer sheet to indicate the word(s) CLOSET  in meaning to the underlined word(s) in each of the following questions.

Excessive amounts of lead in the air can decrease a child’s intelligence.

Read the following passage and mark the letter A,B,C or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks.

Many parents believe that they should begin to teach their children to read when they are slightly more than todders. This is fine if the child shows a real interest but forcing a child could be counter-productive if she isn’t ready. Wise parents will have a (23) ________ attitude and take the lead from their child. What they should provide is a selection of (24) ________ toys, books and other activities. Nowadays there is plenty of good mterial available for young children, and of course, seeing plenty of books in use about the house will also encourage them to read.

    Of course, books are no longer the only source of stories and information. There is also a huge range of videos, (25) ________ can reinfore and extend the pleasure a child finds in a book and are (26) ________ valuable in helping to increase vocabulary and concentration. Television gets a bad review as far as cildren are concerned, mainly because too many spend too much time watching programs not intended for ther age group. Too many television programs induce an incurious, uncritical attitude that is going to make learning much more difficult. However, (27) ________ viewing of programs designed for young children can be useful. Just as adults enjoy reading a book seeing it serialised on television, so children will pounce on books which feature their favourite television characters, and videos can add a new dimension to a story known from a book.

Điền ô số 23

Many parents believe that they should begin to teach their children to read when they are slightly more than todders. This is fine if the child shows a real interest but forcing a child could be counter-productive if she isn’t ready. Wise parents will have a (23) ________ attitude and take the lead from their child. What they should provide is a selection of (24) ________ toys, books and other activities. Nowadays there is plenty of good mterial available for young children, and of course, seeing plenty of books in use about the house will also encourage them to read.

          Of course, books are no longer the only source of stories and information. There is also a huge range of videos, (25) ________ can reinfore and extend the pleasure a child finds in a book and are (26) ________ valuable in helping to increase vocabulary and concentration. Television gets a bad review as far as cildren are concerned, mainly because too many spend too much time watching programs not intended for ther age group. Too many television programs induce an incurious, uncritical attitude that is going to make learning much more difficult. However, (27) ________ viewing of programs designed for young children can be useful. Just as adults enjoy reading a book seeing it serialised on television, so children will pounce on books which feature their favourite television characters, and videos can add a new dimension to a story known from a book.

Điền ô số 24

Many parents believe that they should begin to teach their children to read when they are slightly more than todders. This is fine if the child shows a real interest but forcing a child could be counter-productive if she isn’t ready. Wise parents will have a (23) ________ attitude and take the lead from their child. What they should provide is a selection of (24) ________ toys, books and other activities. Nowadays there is plenty of good mterial available for young children, and of course, seeing plenty of books in use about the house will also encourage them to read.

          Of course, books are no longer the only source of stories and information. There is also a huge range of videos, (25) ________ can reinfore and extend the pleasure a child finds in a book and are (26) ________ valuable in helping to increase vocabulary and concentration. Television gets a bad review as far as cildren are concerned, mainly because too many spend too much time watching programs not intended for ther age group. Too many television programs induce an incurious, uncritical attitude that is going to make learning much more difficult. However, (27) ________ viewing of programs designed for young children can be useful. Just as adults enjoy reading a book seeing it serialised on television, so children will pounce on books which feature their favourite television characters, and videos can add a new dimension to a story known from a book.

Điền ô số 25

Many parents believe that they should begin to teach their children to read when they are slightly more than todders. This is fine if the child shows a real interest but forcing a child could be counter-productive if she isn’t ready. Wise parents will have a (23) ________ attitude and take the lead from their child. What they should provide is a selection of (24) ________ toys, books and other activities. Nowadays there is plenty of good mterial available for young children, and of course, seeing plenty of books in use about the house will also encourage them to read.

          Of course, books are no longer the only source of stories and information. There is also a huge range of videos, (25) ________ can reinfore and extend the pleasure a child finds in a book and are (26) ________ valuable in helping to increase vocabulary and concentration. Television gets a bad review as far as cildren are concerned, mainly because too many spend too much time watching programs not intended for ther age group. Too many television programs induce an incurious, uncritical attitude that is going to make learning much more difficult. However, (27) ________ viewing of programs designed for young children can be useful. Just as adults enjoy reading a book seeing it serialised on television, so children will pounce on books which feature their favourite television characters, and videos can add a new dimension to a story known from a book.

Điền ô số 26

Many parents believe that they should begin to teach their children to read when they are slightly more than todders. This is fine if the child shows a real interest but forcing a child could be counter-productive if she isn’t ready. Wise parents will have a (23) ________ attitude and take the lead from their child. What they should provide is a selection of (24) ________ toys, books and other activities. Nowadays there is plenty of good mterial available for young children, and of course, seeing plenty of books in use about the house will also encourage them to read.

          Of course, books are no longer the only source of stories and information. There is also a huge range of videos, (25) ________ can reinfore and extend the pleasure a child finds in a book and are (26) ________ valuable in helping to increase vocabulary and concentration. Television gets a bad review as far as cildren are concerned, mainly because too many spend too much time watching programs not intended for ther age group. Too many television programs induce an incurious, uncritical attitude that is going to make learning much more difficult. However, (27) ________ viewing of programs designed for young children can be useful. Just as adults enjoy reading a book seeing it serialised on television, so children will pounce on books which feature their favourite television characters, and videos can add a new dimension to a story known from a book.

Điền ô số 27

Mark the following passage and make the letter A,B,C or D on your answer sheet to indicate the correct answer to each of the question

Composers today use a wider variety of sounds than ever before, including many that were once considered undesirable noises. Composer Edgard Varese (1883-1965)  called thus the “liberation of sound…the right to make music with any and all sounds.” Electronic music, for example – made with the aid of computers, synthesizers, and electronic instruments – may include sounds that in the past would not have been considered musical.

          Enviromental sounds, such as thunder, and electronically generated hisses and blips can be recorded, manipulated, and then incorporated into a musical composition. But composers also draw novel sounds from voices and non-electronic instruments. Singers may be asked to scream, laugh, groan, sneeze, or to sing phonetic sounds rather than words. Wind and string players may lap or scrape their instruments. A brass or woodwind player may hum while playing, to produce two pitches at once; a pianist may reach inside the piano to pluck a string and then run a metal blade along it. In the music of the Western world, the greatest expansion and experimentation have involved percussion instruments, which outnumber strings and winds in many recent compositions. Traditional persussion instruments are struck with new types of beaters; and instruments that used to be couriered unconventional in Western music – tom-toms, bongos, slapsticks, maracas – are widely used.

          In the search for novel sounds, increased use has been made in Western music of Microtones. Non-Western music typically divides and intervals between two pitches more finely than Western music does, thereby producing a greater number of distinct tones or micro tones, within the same interval. Composers such as Krzysztof Penderecki create sound that borders on electronic noise through tone clusters – closely spaced tones played together and heard as a mass, block, or band of sound. The directional aspect of sound has taken on new importance as well Loudspeakers or groups of instruments may be placed at opposite ends of the stage, in the balcony, or at the back and sides of the auditorium. Because standard music notation makes no provision for many of these innovations, recent music scores may contain graph like diagrams, new note shapes and symbols, and novel ways of arranging notation on the page.

The word “wider” in line 1 is closet in meaning to ________.

Composers today use a wider variety of sounds than ever before, including many that were once considered undesirable noises. Composer Edgard Varese (1883-1965)  called thus the “liberation of sound…the right to make music with any and all sounds.” Electronic music, for example – made with the aid of computers, synthesizers, and electronic instruments – may include sounds that in the past would not have been considered musical.

          Enviromental sounds, such as thunder, and electronically generated hisses and blips can be recorded, manipulated, and then incorporated into a musical composition. But composers also draw novel sounds from voices and non-electronic instruments. Singers may be asked to scream, laugh, groan, sneeze, or to sing phonetic sounds rather than words. Wind and string players may lap or scrape their instruments. A brass or woodwind player may hum while playing, to produce two pitches at once; a pianist may reach inside the piano to pluck a string and then run a metal blade along it. In the music of the Western world, the greatest expansion and experimentation have involved percussion instruments, which outnumber strings and winds in many recent compositions. Traditional persussion instruments are struck with new types of beaters; and instruments that used to be couriered unconventional in Western music – tom-toms, bongos, slapsticks, maracas – are widely used.

          In the search for novel sounds, increased use has been made in Western music of Microtones. Non-Western music typically divides and intervals between two pitches more finely than Western music does, thereby producing a greater number of distinct tones or micro tones, within the same interval. Composers such as Krzysztof Penderecki create sound that borders on electronic noise through tone clusters – closely spaced tones played together and heard as a mass, block, or band of sound. The directional aspect of sound has taken on new importance as well Loudspeakers or groups of instruments may be placed at opposite ends of the stage, in the balcony, or at the back and sides of the auditorium. Because standard music notation makes no provision for many of these innovations, recent music scores may contain graph like diagrams, new note shapes and symbols, and novel ways of arranging notation on the page.

The passage suggests that Edgard Varese is an example of a composer who ________ .

Composers today use a wider variety of sounds than ever before, including many that were once considered undesirable noises. Composer Edgard Varese (1883-1965)  called thus the “liberation of sound…the right to make music with any and all sounds.” Electronic music, for example – made with the aid of computers, synthesizers, and electronic instruments – may include sounds that in the past would not have been considered musical.

          Enviromental sounds, such as thunder, and electronically generated hisses and blips can be recorded, manipulated, and then incorporated into a musical composition. But composers also draw novel sounds from voices and non-electronic instruments. Singers may be asked to scream, laugh, groan, sneeze, or to sing phonetic sounds rather than words. Wind and string players may lap or scrape their instruments. A brass or woodwind player may hum while playing, to produce two pitches at once; a pianist may reach inside the piano to pluck a string and then run a metal blade along it. In the music of the Western world, the greatest expansion and experimentation have involved percussion instruments, which outnumber strings and winds in many recent compositions. Traditional persussion instruments are struck with new types of beaters; and instruments that used to be couriered unconventional in Western music – tom-toms, bongos, slapsticks, maracas – are widely used.

          In the search for novel sounds, increased use has been made in Western music of Microtones. Non-Western music typically divides and intervals between two pitches more finely than Western music does, thereby producing a greater number of distinct tones or micro tones, within the same interval. Composers such as Krzysztof Penderecki create sound that borders on electronic noise through tone clusters – closely spaced tones played together and heard as a mass, block, or band of sound. The directional aspect of sound has taken on new importance as well Loudspeakers or groups of instruments may be placed at opposite ends of the stage, in the balcony, or at the back and sides of the auditorium. Because standard music notation makes no provision for many of these innovations, recent music scores may contain graph like diagrams, new note shapes and symbols, and novel ways of arranging notation on the page.

The word “it” in line 11 refers to ________.

Composers today use a wider variety of sounds than ever before, including many that were once considered undesirable noises. Composer Edgard Varese (1883-1965)  called thus the “liberation of sound…the right to make music with any and all sounds.” Electronic music, for example – made with the aid of computers, synthesizers, and electronic instruments – may include sounds that in the past would not have been considered musical.

          Enviromental sounds, such as thunder, and electronically generated hisses and blips can be recorded, manipulated, and then incorporated into a musical composition. But composers also draw novel sounds from voices and non-electronic instruments. Singers may be asked to scream, laugh, groan, sneeze, or to sing phonetic sounds rather than words. Wind and string players may lap or scrape their instruments. A brass or woodwind player may hum while playing, to produce two pitches at once; a pianist may reach inside the piano to pluck a string and then run a metal blade along it. In the music of the Western world, the greatest expansion and experimentation have involved percussion instruments, which outnumber strings and winds in many recent compositions. Traditional persussion instruments are struck with new types of beaters; and instruments that used to be couriered unconventional in Western music – tom-toms, bongos, slapsticks, maracas – are widely used.

          In the search for novel sounds, increased use has been made in Western music of Microtones. Non-Western music typically divides and intervals between two pitches more finely than Western music does, thereby producing a greater number of distinct tones or micro tones, within the same interval. Composers such as Krzysztof Penderecki create sound that borders on electronic noise through tone clusters – closely spaced tones played together and heard as a mass, block, or band of sound. The directional aspect of sound has taken on new importance as well Loudspeakers or groups of instruments may be placed at opposite ends of the stage, in the balcony, or at the back and sides of the auditorium. Because standard music notation makes no provision for many of these innovations, recent music scores may contain graph like diagrams, new note shapes and symbols, and novel ways of arranging notation on the page.

According to the passage, which of the following types of instruments has played a role in much of the innovation in Western music?

Composers today use a wider variety of sounds than ever before, including many that were once considered undesirable noises. Composer Edgard Varese (1883-1965)  called thus the “liberation of sound…the right to make music with any and all sounds.” Electronic music, for example – made with the aid of computers, synthesizers, and electronic instruments – may include sounds that in the past would not have been considered musical.

          Enviromental sounds, such as thunder, and electronically generated hisses and blips can be recorded, manipulated, and then incorporated into a musical composition. But composers also draw novel sounds from voices and non-electronic instruments. Singers may be asked to scream, laugh, groan, sneeze, or to sing phonetic sounds rather than words. Wind and string players may lap or scrape their instruments. A brass or woodwind player may hum while playing, to produce two pitches at once; a pianist may reach inside the piano to pluck a string and then run a metal blade along it. In the music of the Western world, the greatest expansion and experimentation have involved percussion instruments, which outnumber strings and winds in many recent compositions. Traditional persussion instruments are struck with new types of beaters; and instruments that used to be couriered unconventional in Western music – tom-toms, bongos, slapsticks, maracas – are widely used.

          In the search for novel sounds, increased use has been made in Western music of Microtones. Non-Western music typically divides and intervals between two pitches more finely than Western music does, thereby producing a greater number of distinct tones or micro tones, within the same interval. Composers such as Krzysztof Penderecki create sound that borders on electronic noise through tone clusters – closely spaced tones played together and heard as a mass, block, or band of sound. The directional aspect of sound has taken on new importance as well Loudspeakers or groups of instruments may be placed at opposite ends of the stage, in the balcony, or at the back and sides of the auditorium. Because standard music notation makes no provision for many of these innovations, recent music scores may contain graph like diagrams, new note shapes and symbols, and novel ways of arranging notation on the page.

The word “thereby” in line 18 is closet in meaning to ________.

Composers today use a wider variety of sounds than ever before, including many that were once considered undesirable noises. Composer Edgard Varese (1883-1965)  called thus the “liberation of sound…the right to make music with any and all sounds.” Electronic music, for example – made with the aid of computers, synthesizers, and electronic instruments – may include sounds that in the past would not have been considered musical.

          Enviromental sounds, such as thunder, and electronically generated hisses and blips can be recorded, manipulated, and then incorporated into a musical composition. But composers also draw novel sounds from voices and non-electronic instruments. Singers may be asked to scream, laugh, groan, sneeze, or to sing phonetic sounds rather than words. Wind and string players may lap or scrape their instruments. A brass or woodwind player may hum while playing, to produce two pitches at once; a pianist may reach inside the piano to pluck a string and then run a metal blade along it. In the music of the Western world, the greatest expansion and experimentation have involved percussion instruments, which outnumber strings and winds in many recent compositions. Traditional persussion instruments are struck with new types of beaters; and instruments that used to be couriered unconventional in Western music – tom-toms, bongos, slapsticks, maracas – are widely used.

          In the search for novel sounds, increased use has been made in Western music of Microtones. Non-Western music typically divides and intervals between two pitches more finely than Western music does, thereby producing a greater number of distinct tones or micro tones, within the same interval. Composers such as Krzysztof Penderecki create sound that borders on electronic noise through tone clusters – closely spaced tones played together and heard as a mass, block, or band of sound. The directional aspect of sound has taken on new importance as well Loudspeakers or groups of instruments may be placed at opposite ends of the stage, in the balcony, or at the back and sides of the auditorium. Because standard music notation makes no provision for many of these innovations, recent music scores may contain graph like diagrams, new note shapes and symbols, and novel ways of arranging notation on the page.

According to the passage, Krzysztof Pederecki is known for which of the following practices?

Composers today use a wider variety of sounds than ever before, including many that were once considered undesirable noises. Composer Edgard Varese (1883-1965)  called thus the “liberation of sound…the right to make music with any and all sounds.” Electronic music, for example – made with the aid of computers, synthesizers, and electronic instruments – may include sounds that in the past would not have been considered musical.

          Enviromental sounds, such as thunder, and electronically generated hisses and blips can be recorded, manipulated, and then incorporated into a musical composition. But composers also draw novel sounds from voices and non-electronic instruments. Singers may be asked to scream, laugh, groan, sneeze, or to sing phonetic sounds rather than words. Wind and string players may lap or scrape their instruments. A brass or woodwind player may hum while playing, to produce two pitches at once; a pianist may reach inside the piano to pluck a string and then run a metal blade along it. In the music of the Western world, the greatest expansion and experimentation have involved percussion instruments, which outnumber strings and winds in many recent compositions. Traditional persussion instruments are struck with new types of beaters; and instruments that used to be couriered unconventional in Western music – tom-toms, bongos, slapsticks, maracas – are widely used.

          In the search for novel sounds, increased use has been made in Western music of Microtones. Non-Western music typically divides and intervals between two pitches more finely than Western music does, thereby producing a greater number of distinct tones or micro tones, within the same interval. Composers such as Krzysztof Penderecki create sound that borders on electronic noise through tone clusters – closely spaced tones played together and heard as a mass, block, or band of sound. The directional aspect of sound has taken on new importance as well Loudspeakers or groups of instruments may be placed at opposite ends of the stage, in the balcony, or at the back and sides of the auditorium. Because standard music notation makes no provision for many of these innovations, recent music scores may contain graph like diagrams, new note shapes and symbols, and novel ways of arranging notation on the page.

According to the passage, which of the following would be considered traditional elements of Western music?

Composers today use a wider variety of sounds than ever before, including many that were once considered undesirable noises. Composer Edgard Varese (1883-1965)  called thus the “liberation of sound…the right to make music with any and all sounds.” Electronic music, for example – made with the aid of computers, synthesizers, and electronic instruments – may include sounds that in the past would not have been considered musical.

          Enviromental sounds, such as thunder, and electronically generated hisses and blips can be recorded, manipulated, and then incorporated into a musical composition. But composers also draw novel sounds from voices and non-electronic instruments. Singers may be asked to scream, laugh, groan, sneeze, or to sing phonetic sounds rather than words. Wind and string players may lap or scrape their instruments. A brass or woodwind player may hum while playing, to produce two pitches at once; a pianist may reach inside the piano to pluck a string and then run a metal blade along it. In the music of the Western world, the greatest expansion and experimentation have involved percussion instruments, which outnumber strings and winds in many recent compositions. Traditional persussion instruments are struck with new types of beaters; and instruments that used to be couriered unconventional in Western music – tom-toms, bongos, slapsticks, maracas – are widely used.

          In the search for novel sounds, increased use has been made in Western music of Microtones. Non-Western music typically divides and intervals between two pitches more finely than Western music does, thereby producing a greater number of distinct tones or micro tones, within the same interval. Composers such as Krzysztof Penderecki create sound that borders on electronic noise through tone clusters – closely spaced tones played together and heard as a mass, block, or band of sound. The directional aspect of sound has taken on new importance as well Loudspeakers or groups of instruments may be placed at opposite ends of the stage, in the balcony, or at the back and sides of the auditorium. Because standard music notation makes no provision for many of these innovations, recent music scores may contain graph like diagrams, new note shapes and symbols, and novel ways of arranging notation on the page.

In paragraph 3, the author mentions diagrams as an example of a new way to ________.

Read the following passage and mark the letter A,B,C or D on your answer sheet to indicate the correct answer to each of the questions.

    An air pollutnt is defined as a compound added directly or indirectly by humans to the atmosphere in such quantities as to affect humans, animals, vegetation, or materials adversely. Air pollution requires a very flexible definition that permits continuous change. When the first air pollution laws were established in England in the fourteenth century, air pollutants were limited to compounds that could be seen or smelled – a far cry from the extensive list of harmful subtances known today. As technology has developed and knowledge of the health aspects of various chemicals has increased, the list of air pollutants has lengthened. In the future, even water vapor might be considered an air pollutant under certain conditions.

    Many of the more important air pollutants, such as sulfur oxides, carbon monoxide, and notrigen oxides, are found in nature. As the Earth developed, the concentration of these pollutants was altered by various chemical reactions; they became components in biogeochemical cycles. These serve as an air purification scheme by allowing the compounds to move from the air to the water or soil. On a global basis, nature’s output of these compounds dwarfs that resulting from human activities.

          However, human production usually occurs in a localized area, such as as city. In such a region, human output may be dominant and may temporarily overload the natural purification scheme of the cycles. The result is an increased concentration of noxious chemicals in the air. The concentrations at which the adverse effects appear will be greater than the concentrations that the pollutants would have in the absence of human activities. The actual concentration need not be large for a subtance to be a pollutant; in fact, the numerial value tells us little until we know how much of an increase this represents over ther concentration that would occur naturally in the area. For example, sulfur dioxide has detectable health effects at 0.08 parts per million (ppm), which is about 400 times its natural level. Carbon monoxide, however, has a natural level of 0.1 ppm and is not usually a pollutant until its level reaches about 15 ppm.

What does the passage mainly discuss?

    An air pollutnt is defined as a compound added directly or indirectly by humans to the atmosphere in such quantities as to affect humans, animals, vegetation, or materials adversely. Air pollution requires a very flexible definition that permits continuous change. When the first air pollution laws were established in England in the fourteenth century, air pollutants were limited to compounds that could be seen or smelled – a far cry from the extensive list of harmful subtances known today. As technology has developed and knowledge of the health aspects of various chemicals has increased, the list of air pollutants has lengthened. In the future, even water vapor might be considered an air pollutant under certain conditions.

    Many of the more important air pollutants, such as sulfur oxides, carbon monoxide, and notrigen oxides, are found in nature. As the Earth developed, the concentration of these pollutants was altered by various chemical reactions; they became components in biogeochemical cycles. These serve as an air purification scheme by allowing the compounds to move from the air to the water or soil. On a global basis, nature’s output of these compounds dwarfs that resulting from human activities.

          However, human production usually occurs in a localized area, such as as city. In such a region, human output may be dominant and may temporarily overload the natural purification scheme of the cycles. The result is an increased concentration of noxious chemicals in the air. The concentrations at which the adverse effects appear will be greater than the concentrations that the pollutants would have in the absence of human activities. The actual concentration need not be large for a subtance to be a pollutant; in fact, the numerial value tells us little until we know how much of an increase this represents over ther concentration that would occur naturally in the area. For example, sulfur dioxide has detectable health effects at 0.08 parts per million (ppm), which is about 400 times its natural level. Carbon monoxide, however, has a natural level of 0.1 ppm and is not usually a pollutant until its level reaches about 15 ppm.

The word “adversely” in the first paragraph is closet in meaning to ________.

    An air pollutnt is defined as a compound added directly or indirectly by humans to the atmosphere in such quantities as to affect humans, animals, vegetation, or materials adversely. Air pollution requires a very flexible definition that permits continuous change. When the first air pollution laws were established in England in the fourteenth century, air pollutants were limited to compounds that could be seen or smelled – a far cry from the extensive list of harmful subtances known today. As technology has developed and knowledge of the health aspects of various chemicals has increased, the list of air pollutants has lengthened. In the future, even water vapor might be considered an air pollutant under certain conditions.

    Many of the more important air pollutants, such as sulfur oxides, carbon monoxide, and notrigen oxides, are found in nature. As the Earth developed, the concentration of these pollutants was altered by various chemical reactions; they became components in biogeochemical cycles. These serve as an air purification scheme by allowing the compounds to move from the air to the water or soil. On a global basis, nature’s output of these compounds dwarfs that resulting from human activities.

          However, human production usually occurs in a localized area, such as as city. In such a region, human output may be dominant and may temporarily overload the natural purification scheme of the cycles. The result is an increased concentration of noxious chemicals in the air. The concentrations at which the adverse effects appear will be greater than the concentrations that the pollutants would have in the absence of human activities. The actual concentration need not be large for a subtance to be a pollutant; in fact, the numerial value tells us little until we know how much of an increase this represents over ther concentration that would occur naturally in the area. For example, sulfur dioxide has detectable health effects at 0.08 parts per million (ppm), which is about 400 times its natural level. Carbon monoxide, however, has a natural level of 0.1 ppm and is not usually a pollutant until its level reaches about 15 ppm.

It can be inferred from the first paragraph that ________.

    An air pollutant is defined as a compound added directly or indirectly by humans to the atmosphere in such quantities as to affect humans, animals, vegetation, or materials adversely. Air pollution requires a very flexible definition that permits continuous change. When the first air pollution laws were established in England in the fourteenth century, air pollutants were limited to compounds that could be seen or smelled – a far cry from the extensive list of harmful subtances known today. As technology has developed and knowledge of the health aspects of various chemicals has increased, the list of air pollutants has lengthened. In the future, even water vapor might be considered an air pollutant under certain conditions.

    Many of the more important air pollutants, such as sulfur oxides, carbon monoxide, and notrigen oxides, are found in nature. As the Earth developed, the concentration of these pollutants was altered by various chemical reactions; they became components in biogeochemical cycles. These serve as an air purification scheme by allowing the compounds to move from the air to the water or soil. On a global basis, nature’s output of these compounds dwarfs that resulting from human activities.

          However, human production usually occurs in a localized area, such as as city. In such a region, human output may be dominant and may temporarily overload the natural purification scheme of the cycles. The result is an increased concentration of noxious chemicals in the air. The concentrations at which the adverse effects appear will be greater than the concentrations that the pollutants would have in the absence of human activities. The actual concentration need not be large for a subtance to be a pollutant; in fact, the numerial value tells us little until we know how much of an increase this represents over ther concentration that would occur naturally in the area. For example, sulfur dioxide has detectable health effects at 0.08 parts per million (ppm), which is about 400 times its natural level. Carbon monoxide, however, has a natural level of 0.1 ppm and is not usually a pollutant until its level reaches about 15 ppm.

The word “These” in the second paragraph is closet in meaning to ________.

    An air pollutant is defined as a compound added directly or indirectly by humans to the atmosphere in such quantities as to affect humans, animals, vegetation, or materials adversely. Air pollution requires a very flexible definition that permits continuous change. When the first air pollution laws were established in England in the fourteenth century, air pollutants were limited to compounds that could be seen or smelled – a far cry from the extensive list of harmful subtances known today. As technology has developed and knowledge of the health aspects of various chemicals has increased, the list of air pollutants has lengthened. In the future, even water vapor might be considered an air pollutant under certain conditions.

    Many of the more important air pollutants, such as sulfur oxides, carbon monoxide, and notrigen oxides, are found in nature. As the Earth developed, the concentration of these pollutants was altered by various chemical reactions; they became components in biogeochemical cycles. These serve as an air purification scheme by allowing the compounds to move from the air to the water or soil. On a global basis, nature’s output of these compounds dwarfs that resulting from human activities.

          However, human production usually occurs in a localized area, such as as city. In such a region, human output may be dominant and may temporarily overload the natural purification scheme of the cycles. The result is an increased concentration of noxious chemicals in the air. The concentrations at which the adverse effects appear will be greater than the concentrations that the pollutants would have in the absence of human activities. The actual concentration need not be large for a subtance to be a pollutant; in fact, the numerial value tells us little until we know how much of an increase this represents over ther concentration that would occur naturally in the area. For example, sulfur dioxide has detectable health effects at 0.08 parts per million (ppm), which is about 400 times its natural level. Carbon monoxide, however, has a natural level of 0.1 ppm and is not usually a pollutant until its level reaches about 15 ppm.

For which of the following reasons can natural pollutants play an important role in controlling air pollution ?

    An air pollutant is defined as a compound added directly or indirectly by humans to the atmosphere in such quantities as to affect humans, animals, vegetation, or materials adversely. Air pollution requires a very flexible definition that permits continuous change. When the first air pollution laws were established in England in the fourteenth century, air pollutants were limited to compounds that could be seen or smelled – a far cry from the extensive list of harmful subtances known today. As technology has developed and knowledge of the health aspects of various chemicals has increased, the list of air pollutants has lengthened. In the future, even water vapor might be considered an air pollutant under certain conditions.

    Many of the more important air pollutants, such as sulfur oxides, carbon monoxide, and notrigen oxides, are found in nature. As the Earth developed, the concentration of these pollutants was altered by various chemical reactions; they became components in biogeochemical cycles. These serve as an air purification scheme by allowing the compounds to move from the air to the water or soil. On a global basis, nature’s output of these compounds dwarfs that resulting from human activities.

          However, human production usually occurs in a localized area, such as as city. In such a region, human output may be dominant and may temporarily overload the natural purification scheme of the cycles. The result is an increased concentration of noxious chemicals in the air. The concentrations at which the adverse effects appear will be greater than the concentrations that the pollutants would have in the absence of human activities. The actual concentration need not be large for a subtance to be a pollutant; in fact, the numerial value tells us little until we know how much of an increase this represents over ther concentration that would occur naturally in the area. For example, sulfur dioxide has detectable health effects at 0.08 parts per million (ppm), which is about 400 times its natural level. Carbon monoxide, however, has a natural level of 0.1 ppm and is not usually a pollutant until its level reaches about 15 ppm.

According to the passage, human-generated air pollution in localized regions ________.

    An air pollutant is defined as a compound added directly or indirectly by humans to the atmosphere in such quantities as to affect humans, animals, vegetation, or materials adversely. Air pollution requires a very flexible definition that permits continuous change. When the first air pollution laws were established in England in the fourteenth century, air pollutants were limited to compounds that could be seen or smelled – a far cry from the extensive list of harmful subtances known today. As technology has developed and knowledge of the health aspects of various chemicals has increased, the list of air pollutants has lengthened. In the future, even water vapor might be considered an air pollutant under certain conditions.

    Many of the more important air pollutants, such as sulfur oxides, carbon monoxide, and notrigen oxides, are found in nature. As the Earth developed, the concentration of these pollutants was altered by various chemical reactions; they became components in biogeochemical cycles. These serve as an air purification scheme by allowing the compounds to move from the air to the water or soil. On a global basis, nature’s output of these compounds dwarfs that resulting from human activities.

          However, human production usually occurs in a localized area, such as as city. In such a region, human output may be dominant and may temporarily overload the natural purification scheme of the cycles. The result is an increased concentration of noxious chemicals in the air. The concentrations at which the adverse effects appear will be greater than the concentrations that the pollutants would have in the absence of human activities. The actual concentration need not be large for a subtance to be a pollutant; in fact, the numerial value tells us little until we know how much of an increase this represents over ther concentration that would occur naturally in the area. For example, sulfur dioxide has detectable health effects at 0.08 parts per million (ppm), which is about 400 times its natural level. Carbon monoxide, however, has a natural level of 0.1 ppm and is not usually a pollutant until its level reaches about 15 ppm.

According to the passage, the numerical value of the concentration level of a substance is only useful if ________.

Mark the letter A,B,C or D on our answer sheet to indicate the underlined part that needs correction in each of the following questions.

Alike oxygen, which is chemically changed by our bodies into carbon dioxide, nitrogen is  merely exhaled back into the air.

Mark the letter A,B,C or D on our answer sheet to indicate the underlined part that needs correction in each of the following questions.

Working like a police officier means earning a good salary, excellent retirement benefits, and great health insurance for you and your family.

Mark the letter A,B,C or D on our answer sheet to indicate the underlined part that needs correction in each of the following questions.

Lasers are of great value in areas such as communication, industry, medicines and scientific research.

Mark the letter A,B,C or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions

I’d suggest that we avoid telling any scary story stories with Janet around. She’ a bit unstable and could get hysterical.

Mark the letter A,B,C or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions.

They were suspected to have robbed the bank. The police have investigated them for days.

Mark the letter A,B,C or D on your answer sheet to indicate the sentence that is closet in meaning to each of the following questions.

Had I known how crowded it’s be, I’d have never moved to Madrid.

Mark the letter A,B,C or D on your answer sheet to indicate the sentence that is closet in meaning to each of the following questions.

Their parents gave them permission to get married.

Mark the letter A,B,C or D on your answer sheet to indicate the sentence that is closet in meaning to each of the following questions.

After the operation, she recovered far quicker than any of us had expected her to.