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III.阅读理解（一） （本题共15小题，每小题2分，满分30分） 阅读下列短文，从各题所给的四个选项中，选出最佳选项。 A Thirty years ago. Lake Ponkapog was full of life. Many birds and animals lived beside the water, which was full of fish. Now there are few birds, animals and fish. The lake water is polluted. It is filled with strange plants. How did this happen? First, we must think about how water gets into Ponkapog. When it rains,water comes into the lake from all around. In the past, there were forests all around Lake Ponkapog, so the rainwater was clean. Now there are many homes around the lake. People often use chemicals in their gardens. They use other chemicals inside their houses for cleaning of killing insects(昆虫). There are also many businesses.Businesses use chemicals in their-machines or shops. When it rains, the rainwater picks up all the chemicals from homes and businesses and then carries them into the lake. So more bad chemicals go into the water this way. People around the lake love their lake and want to save it. Will it be possible? A clean lake must have clean rainwater going into it. Clean rainwater is possible only if people are careful about chemicals at home and at work. They must also be more careful about gas and oil and other chemicals on the ground, and they mustn't use motorboats any more on the lake. All these may change people's lives. Only then can Lake Ponkapog be a beautiful clean lake again. 1 .In the past the water in Lake Ponkapog was made clean by ______. A. fish B. rain C. birds D. forests 2. From the fourth paragraph we know that _______. A. people like to go boating on the lake B. some bad chemicals are important to the lake C. chemicals-from motorboats also make the lake water dirty D. how oil gets into the lake water 3. To save the lake, people need to __________. A. use less water B. changed their daily lives C. grow fewer plants in the gardens D. be less careful about chemicals 4. "Chemicals" in the story means ___________. A. 污染品B.化学家C.药品D.化学制品 5. What makes the lake water dirty? A. Chemicals B. Strange plants C. Rainwater D. Both A and B (责任编辑：admin) |