先通读下面短文掌握其大意，然后在短文后面各题所给的选项中选出最佳选项，并将其字母代号填入题前括号内。

The earth is our home. We must take care of it. Life today is easier than it was　 56　 years ago, but 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 hear it.

　 Man has polluted the　 57　 . The more people, the more pollution. Many years ago, the problem was not so serious because there were not so　 58　 people. When the land was used up(用光) or the river was not clean in a place, man went to　 59　 place. Now man is slowly polluting the whole world.

　 60　 pollution is still the most serious, it’s bad for　 61　 things in the world.

Many countries don’t let people burn(燃烧)　 62　 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(由……引起) heavy traffic. People say it’s　　 63　 to ride bikes. When you are riding, there is no pollution. But even in developed countries, most people don’t go to work by bike. It’s not because bikes are expensive or people are tired if they ride to work. It’s because the number of cars on the roads becomes larger, So more people　 64　 their bikes and go to work by car, then things are getting worse and worse. We should have special(特别的) roads only for bikes and make it　 65　 difficult and expensive for drivers to take their cars into the city that they will go back to using their bikes.

26.(　 )　 A.　 hundred　　　 B.　 hundreds of　　　 C.　 hundred of　　 D.　 hundreds

(　 27.　 A.　 moon　　　　 B.　 star　　　　　　 C .　 earth　　　　　 D.　 sun

28.(　 )　 A.　 lot　　　　　 B.　 little　　　　　　 C.　 many　　　　　 D.　 much

29.(　 )　 A.　 others　　 B.　 the others　　　　 C .　 the other　　 D.　 another

30.(　 )　 A.　 Air　　　 B.　 Food　　　 　　　C.　 Water　　　　 D.　 Noise

31.(　 )　 A.　 life　　　 B.　 live　　　　　　 C.　 living　　　　 D.　 lives

32.(　 )　 A.　 something bad　　　　　　　　　 B.　 bad something

　　　　 C.　 something good　　　　　　　　 D.　 good something

33.(　 )　 A.　 least　　 　B.　 best　　　　　　 C.　 most　　　　 D.　 worst

(　 34.　 A.　 put on　　 B.　 look at　　　　　 C.　 put away　　 D.　 look up

35.(　 ) A.　 quite　　　 B.　 such　　　　　　 C.　 very　　　　 D.　 so

25. My work is _____________ done. I'll be right with you.

　　 A. hour after hour　　　　　　　　　 B. now and then

　　 C. more or less　　　　　　　　　　 D. more and more

24. - I've got an offer in New York.

　　 - Oh, ________!　 But I'm going to miss you.

　 A. that's too bad　　　　　　　　　　　　 B. I'm sorry

　 C. I beg your pardon　　　　　　　　　　 D. that's great

23.- This dress was last year's style.

　 - I think it still looks perfect ______ it has gone out this year.

　 A. so that　　　　　 B. even though　　 C. as if　　　　　 D. ever since

22. - I'm waiting for the mail. Do you know _____ it will arrive?

　　 - Usually it comes by 4:00.

　　 A. how　　　　　　　 B. where　　　　　 C. when　　　　　 D. what