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

One of the most urgent environment problems in the world today is the shortage of clean water.Having clean drinking water is a basic human right.But acid rain, industrial pollution and garbage have made many sources of water undrinkable.Lakes and even entire seas have become large pools of poison.Lake Baikal in Russia is one of largest lake in the world.It contains a rich variety of animals and plants, including 1, 300 rare species that do not exist anywhere else in the world.But they are being destroyed by the massive volumes of industrial pollutants which pour into the lake everyday.Even where law existed, the government did not have the power to enforce them.Most industries simply ignore the regulations.The Mediterranean Sea occupies 1% of the world's water surface.But it is the dumping ground for 50% of all marine pollution.Almost sixteen countries regularly throw industrial wastes a few miles off shore.Water is free to everyone.A few years ago people thought that the supply of clean water in the world was limitless.Today, many water supplies have been ruined by pollution and sewage.Clean water is now scarce, and we are at last beginning to respect this precious source.We should do something now.

One environment problem in the world today is_________.

Smoke and waste chemicals make the air and water ______.

Read the followingpassage 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.

The human civilization underwent many changes and development with the passage of time. In course of time, cities became the major centers of livelihood. A city has large population compared to a town and a village. Life is full (21)______ activities in a big city. It is a center of education, trade and industry, (22)______, etc. Life in a big city starts early in the morning. School children, office-workers, and others fill (23)______ roads, bus-stops and the vehicles. The market places get crowded with people. Life in the city has certain charms. The factories and the industrial centers give employment to thousands of people. Those (24)______ work hard in cities rise in life. Here, neighbors live like (25)______. Everyone finds himself in hurry and worry. The atmosphere is polluted. There is competition in every sphere. However, cities add to the economic development of a nation.

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