閱讀理解

　　Thirty years ago, Lake Ponkapog in Hartwell, New Jersey, 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(污染的). It is in a colour of dirty brown, and 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(化學(xué)品) in their gardens. They use other chemicals inside their houses for cleaning or killing insects(昆蟲). There are also many businesses. Businesses use chemicals in their machines or shops. Other chemicals fall onto the ground from cars or trucks. 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(油和汽) from boats often get into the lake. So more bad chemicals go into the water this way.

　　People in Hartwell are worried. They 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 more 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.

根據(jù)短文內(nèi)容，從A、B、C、D中選擇最佳答案．

1．In the past, the water in Lake Ponkapog was made clean by ________.

[　　]

A．forests
B．rain
C．birds
D．fish

2．Chemicals from homes and businesses ________.

[　　]

A．a(chǎn)re always clean

B．can help the animals

C．a(chǎn)re good for the lake

D．get into the rainwater

3．Cleaner rainwater will mean ________.

[　　]

A．more boats on the lake

B．more dirty things in the lake

C．a(chǎn) cleaner lake

D．a(chǎn) dirtier lake

4．To save Lake Ponkapog, people need to ________.

[　　]

A．be more careful about chemicals

B．use less water

C．grow fewer plants in the gardens

D．use more motorboats on the lake

5．The passage is about ________.

[　　]

A．boats on Lake Ponkapog

B．why the water in Lake Ponkapog is dirty

C．clean rainwater

D．dirty lakes

答案：A;D;C;A;B
解析：

　　1．這是一道細(xì)節(jié)題．根據(jù)第二段中的第2句及第3句“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”可確定答案．

　　2．第三段詳述了這一過程．關(guān)鍵句子是：When it rains, the rainwater picks up pall the chemicals from homes and businesses and then carries them into the lake.

　　3．這是一道推理題．在文章最后一段有明確的說明：A clean lake must have clean rainwater going into it.只要理解這個(gè)句子的含義，就可以很自然地得出答案為了．

　　4．這是一道判斷題．第五段中有這樣兩句話：Clean rainwater is possible only if people are more careful about chemicals at home and at work. They must also be more careful about gas and oil and other chemicals on the ground.據(jù)此可以得出答案．

　　5．這是一道確定中心大意的題目，即指明文章的中心思想．這需要通讀和理解全篇文章后才能確定．根據(jù)本篇短文的意思，可得出答案．


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