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.
Human Nutrition is the study of how food affects the health and survival of the human body. Human beings require food to grow, reproduce, and maintain good health. Without food, our bodies could not stay warm, build or repair tissue, or maintain the heartbeat. Eating the right foods can help us avoid certain diseases or recover faster when illness occurs. These and other important functions are fueled by chemical substances in our food called nutrients. Nutrients are classified as carbohydrates, proteins, fats, vitamins, minerals, and water.
When we eat a meal, nutrients are released from food through digestion. Digestion begins in the mouth by the action of chewing and the chemical activity of saliva, a watery fluid that contains enzymes, certain proteins that help break down food. Further digestion occurs as food travels through the stomach and the small intestine, where digestive enzymes and acids liquefy food and muscle contractions push it along the digestive tract. Nutrients are absorbed from the inside of the small intestine into the bloodstream and carried to the sites in the body where they are needed. At these sites, several chemical reactions occur, which ensures the growth and function of body tissues. The parts of foods that are not absorbed continue to move down the intestinal tract and are eliminated from the body as feces.
Once digested, carbohydrates, proteins, and fats provide the body with the energy it needs to maintain its many functions. Scientists measure this energy in kilocalories, the amount of energy needed to raise one kilogram of water one degree Celsius. In nutrition discussions, scientists use the term calorie instead of kilocalorie as the standard unit of measure in nutrition.
Nutrients are classified as essential or nonessential. Nonessential nutrients are manufactured in the body and do not need to be obtained from food. Examples include cholesterol, a fatlike substance present in all animal cells. Essential nutrients must be obtained from food sources, because the body either does not produce them or produces them in amounts too small to maintain growth and health. Essential nutrients include water, carbohydrates, proteins, fats, vitamins, and minerals.
An individual needs varying amounts of each essential nutrient, depending upon such factors as gender and age. Specific health conditions, such as pregnancy, breast-feeding, illness, or drug use, make unusual demands on the body and increase its need for nutrients. Dietary guidelines, which take many of these factors into account, provide general guidance in meeting daily nutritional needs.
From “Human Nutrition” by Worthington-Roberts, Bonnie, Microsoft ® Student 2009.
The word “released” in the second paragraph mostly means “ ”
A. refused
B. produced
C. expressed
D. renewed
Giải bởi qa.haylamdo.com
Chọn B
“release” = “produce”: thả ra, giải phóng
Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.
Helen likes to listen to music, (A) to go to the cinema,(B) to chat on the phone (C) and going shopping. (D)
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 correct answer to each of the following questions.
The primary causes of species extinction result _________habitat destruction, commercial exploitation and pollution.
Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.
The picture is _________; the thief will be most disappointed when he tries to sell it
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 from 33 to 42. Fill in the appropriate word in question 41
TRAFFIC LIGHTS
The first traffic signal was invented by a railway signaling engineer. It was installed (33) ___ the Houses of Parliament in 1868. It (34)_____ like any railway signal of the time, and was operated by gas. (35) ____, it exploded and killed a policeman, and the accident discouraged further development until cars became common.
(36) ____ traffic lights are an American invention. Red – green systems were installed in Cleveland in 1914. Three - color signals, operated (37) _____ hanz d from a tower in the (38) _____ of the street, were installed in New York in 1918. The first lights of this type to (39) ____ in Britain were in London, on the junction between St. James’s Street and Piccadilly, in 1925. Automatic signals were installed (40) ____ year later.
In the past, traffic lights were special. In New York, some lights had a statue on top. In Los Angeles the lights did not just change silently, but would ring bells to (41) _____ the sleeping motorists of the 1930s. These are gone and have been (42) ____ by standard models which are universally adopted.
Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.
Toxic chemicals in the air and land, contaminated water and increased water temperatures have also driven many spices to the verge _________ extinction.
Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.
Children enjoy telling and listening (A) to ghosts stories, (B) especially (C) on Halloween night. (D)
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 from 33 to 42. Fill in the appropriate word in question 40
TRAFFIC LIGHTS
The first traffic signal was invented by a railway signaling engineer. It was installed (33) ___ the Houses of Parliament in 1868. It (34)_____ like any railway signal of the time, and was operated by gas. (35) ____, it exploded and killed a policeman, and the accident discouraged further development until cars became common.
(36) ____ traffic lights are an American invention. Red – green systems were installed in Cleveland in 1914. Three - color signals, operated (37) _____ hanz d from a tower in the (38) _____ of the street, were installed in New York in 1918. The first lights of this type to (39) ____ in Britain were in London, on the junction between St. James’s Street and Piccadilly, in 1925. Automatic signals were installed (40) ____ year later.
In the past, traffic lights were special. In New York, some lights had a statue on top. In Los Angeles the lights did not just change silently, but would ring bells to (41) _____ the sleeping motorists of the 1930s. These are gone and have been (42) ____ by standard models which are universally adopted.
Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.
Professor Jones said (A) that a good way to improve (B) your language are (C) learning to practise (D) it.
Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.
We had better to review (A) this chapter carefully (B) because we will (C) have some (D) questions on it on our test tomorrow.
Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.
Nga: “Do you think that we should use public transportation to protect our environment?” Nam: “ _________”
Mark the letter A, B, C or D on your answer sheet to indicate the word(s)CLOSEST in meaning to the underlined word(s) in each of the following questions.
Lack of water and nutrients has impeded the growth of these cherry tomato plants.
Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.
________you do better work than this, you won't pass the exam
Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.
People _________can speak English can be understood in many countries.
Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.
We bought some __________
