27. Chemicals in the body______________ our food into useful substance.　

A. mix up B. deal with　 C. bring in　 D. break down

26. When I stayed at Aunt Liu's, she would tell me about the great changes which___________ in the village.　

A. have taken place　　　　　　 B. had taken place　

C. took place　　　　　　　　　 D. would take place

25. To do a bit for the motherland, _______________

A. working hard is necessary　

B. to learn a foreign language is needed　

C. it is important to master science　

D. one should serve the people whole heartedly

24.-Did everyone pass the examination?　

-No, only three of them who passed it.　

A. there was　　　 B. it was　　　 C. these were　　 D. that was

23.-Do you mind if I keep pets in this building?

-_______________________________________　

A. I'd rather you didn't actually　 B. Of course not, it's not allowed here　

C. Great! I love pets　　　　　　　 D. No, you can't

22. Are the two glasses believed___________ by Tom?　

A. broken　　　　 B. to be broken　 C. to break　　　 D. to have been broken

第一节 单项填空(共15小题；每小题1分，满分15分)

从A、B、C、D、四个选项中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。

21.-Now that you like the garden so much, why not buy it?　

-Well, I can't afford______________ garden.　

A. such big a　　 B. that big a　　 C. a big that　　 D. so a big