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 fil 题目和参考答案——青夏教育精英家教网—

题目内容

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 Lake 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 or 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. They pollute the water and kill the animals.

Boats on the lake are also a problem. Lake Ponkapog is a popular place for motorboats. But oil and gas from boats often get into the lake. So more harmful chemicals go into the water in this way.

People around the lake love this 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 in the ground. And they mustn't use motorboats any more on the lake. All these may change people's lives. But 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. hill B. rain C. animals D. forests

( ) 2. The fourth paragraph mainly tells us .

A. people like to go boating on the lake

B. some bad chemicals

C. chemicals from motorboats also make the lake water dirty

D. how oil and gas gets into the lake water

( ) 3. To save the lake,people need to .

A. be less careful about chemicals

B. use more gas and oil

C. grow fewer plants beside the lake

D. change their daily lives

( ) 4. "Chemicals" in the story means " ”.

A.化学家 B.污染品 C.药品 D.化学制品

( ) 5. What makes the lake water dirty?

A. Chemicals. B. Boats. C. Fish. D. Both A and B.

1. D 2. C 3. D 4. D 5. A

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