Question

阅读理解

　　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(化学品) 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. 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.

根据短文内容，从A、B、C、D中选择最佳答案．

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．are always clean

B．can help the animals

C．are 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 cleaner lake

D．a 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

Answer 1

答案：A;D;C;A;B
解析：

1．这是一道细节题．根据第二段中的第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”可确定答案． 　　2．第三段详述了这一过程．关键句子是：When it rains, the rainwater picks up pall the chemicals from homes and businesses and then carries them into the lake. 　　3．这是一道推理题．在文章最后一段有明确的说明：A clean lake must have clean rainwater going into it.只要理解这个句子的含义，就可以很自然地得出答案为了． 　　4．这是一道判断题．第五段中有这样两句话：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.据此可以得出答案． 　　5．这是一道确定中心大意的题目，即指明文章的中心思想．这需要通读和理解全篇文章后才能确定．根据本篇短文的意思，可得出答案．