河北省衡水二中2010年新高一暑假作业及答案（英语）(12)

The earth is our home. We must take care of it. Life today is easier than it was hundreds of years ago, __17__ it has brought some new problems. One of the biggest problems is pollution(污染). We can see it, smell it, drink it and even __18__ it.

Man has polluted the earth. The more people, the more pollution. Many years ago, the problem was not so serious because there were not so many __19__. When the land was used up(用光) or the __20__ was not clean in a place, man went to other place. Now man is slowly polluting the world.

Air pollution is still the most serious, it's bad for living things in the world.

Many countries don't let people burn something __21__ for air in houses and factories in the city. Pollution by SO2 is now the most dangerous kind of air pollution. It's caused by heavy traffic. People say it's best to ride bikes. Because when you are riding, there is no pollution. But even in developed(发达的) countries, most people don't go to work by __22__. It's because the number of cars on the roads becomes larger. So more people put away their bikes and go to work by car, then things are getting worse and worse. We should have special(特别的) __23__ only for bikes and make it so difficult and expensive for drivers to take their cars into the city that they will go back to __24__ their bikes.

17. A. if B. but C. and D. or

18. A. hear B. know C. catch D. use

19. A. animals B. trees C. people D. hills

20. A. trees B. land C. grass D. river

21. A. new B. old C. good D. bad

22. A. train B. car C. bike D. air

23. A. money B. roads C. city D. people

24. A. use B. buy C. borrow D. mend

三、阅读理解（共18分，每小题2分）

阅读下面的三篇短文，根据短文内容，从短文后各题所给的A、B、C、D四个选项中，选择最佳选项。

A

Do you know how to write an English letter?

When we write a letter in Chinese, we always put the date(日期) at the end of the letter. But it is different in English. We have to put it on the top of the right corner(右上角). And above the date, we also write the number of our house and the names of our street, city and country. To begin the letter, we always use words like: "Dear sir", "Dear Mr, Mrs, Miss, ..." At the end of the letter, we usually use words like "Yours", "Yours ever", or "Truly yours".