48. The way to stop water pollution is _____.

A. to put oxygen into the river　　

B. to realize the serious situation clearly

C. to make special room in the sea for our waste　　　　

D. to make the waste materials harmless

47. What is the meaning of “waterproof”, the underlined word in the third paragraph?

A. full of water　　　　　　　　　　　 B. covered with water　

C. not allowing water to go through　　　 D. cleaned by water

46. The living things die because there is no ______ in the lake or river.

A. oxygen　　　 B. poison　　　 C. water　　　 D. fish

45. Pollution in water is noticed________.

A. when the first organisms are affected　　　

B. when a great many fish and birds die

C when poisons are poured into water　　　　

D. as soon as the balance of nature is destroyed

44. Which can be the best title for this story?

　　　 A. Mother’s True Love　　　　　　　　　　　　　　　 B. Early Love Between Students

　　　 C. To ask or Not To Ask 　　　　　　　　　　　　　 D. Dangerous Age

B

As a result of pollution, Lake Eric, on the borders of the U.S.A. and Canada, is now without many living things.

Pollution in water is not simply a matter of “poisons” killing large numbers of fish overnight. Very often the effects of pollution are not noticed for many months or years because the first organisms(生物体)to be affected are either plants or plankton(浮游生物). These organisms are the food of fish, birds, and other creatures. When this food disappears, the fish and the birds die too. In this way a whole food chain can be wiped out, and it is not until dead fish and water birds are seen at the river’s edge or on the sea shore that people realize what is happening.

Where do the substances which pollute the water come from? There are two main sources, swage(污水) and industrial waste. As more detergent(洗涤剂) is used in the homes, so more of it is finally put into our rivers, lakes and seas. Detergents harm water birds, breaking down the natural substances which keep their feathers waterproof. Sewage itself, if not properly treated, makes the water dirty and prevents all forms of life in rivers and the sea from receiving the oxygen they need. Industrial waste is even more harmful since there are many highly poisonous materials in it, such as copper and lead.

So, if we want to stop this pollution, the answer is simple. Sewage and industrial waste must be made clean before flowing into the water reservoirs. It may already be too late to save some rivers and lakes, but others can still be saved if the correct action is taken at once.

43.The main purpose of this article is to show that parents should______

　　　 A. care about what their children really think and feel

　　　 B. not give much freedom to their children

　　　 C. talk with their children about their early love

　　　 D. keep silent about their children’s privacy

42. From the diary, we can see the daughter _______.

　　　 A. thanked her mother for asking her

　　　 B. thought her mother cared about her very much

　　　 C. thought it was her mother’s duty to ask

　　　 D. thought her mother’s understanding is better than simple love

41. Which is the correct order according to the story?

　　　 a. She took a lift back in her monitor’s car.　 b. She went to see a film with her classmate.

　　　 c. She wrote a diary to her mother.　　　　　　　 d. Her mother pretended to watch TV.

　　　 e. Her mother worried about her daughter’s returning late.

　　　 A. b, e, a, d, c　　　　　 B. e, b, a, d, c　　　　　 C. b, a, e, d, c　　　　　 D. b, e, a, c, d

39. A. others　　　 　　B. the　　 　　　　　C. their　　　　 　　　D. your