31. The last half of the nineteen century _________ the steady improvement in the means of

travel.

A. see　　　　 　　B. viewed　　　　 　C. voiced　　　　 　D. witnessed

30. ---- I’d like to book for tonight.

　 ---- Sorry, sir, but we don’t have any rooms __________ at the moment.

A. usable　　　 B. suitable　　　 C. available　　　 D. convenient

29. __________ such heavy pollution already, it may now be too late to clean up the river.

A. Having been suffered　　　　　　　　 B. Having suffered from

C. Suffering　　　　　　　　　　　　　 D. Having suffered

28. ----- Are you still thinking about yesterday’s games?　 ------ Oh, that’s ______________.

A. what makes me feel excited　　　　　 B. whatever I feel about it

C. how I feel about it　　　　 　　　　　D. when I feel excited

27. The bell _________ the end of the period rang, ________ our heated discussion.

A. indicating; interrupted　　　　　　　 B. indicating; interrupting　　　

C. indicated; interrupted　　　　　　　 D. indicated; interrupting

26. When I try to understand _________ that prevents so many Americans from being as happy as one might expect, it seems to me that there are two causes.

A. why it does　　　 B. what it does　　　 C. what it is　　　 D. how it is

25. ---- I’d like to take a week’s holiday.　　　

----- ________, we’re too busy.

A. Don’t worry.　　 B. Don’t mention it.　　 C. Pardon me.　 D. Forget it.

24. The man we followed suddenly stopped and looked as if _________ whether he was going in the right direction.

A. seeing　　　　 B. having seen　　　 C. to have seen　　　 D. to see

23. __________ to give up smoking, he threw away his ________ cigarettes.

　　 A. Determined; remained　　　　　　 B. Determined; remaining

　　 C. Determining; remained　　　　　　 D. Determining; remaining

22. The government would be unwise ________ the growing dissatisfaction with its economic policies.

A. to ignore　　　 B. to miss　　　　 C. to turn down　　　 D. to forget