31. As a result of destroying the forests, a large 　　　　　　of desert

　　　 　covered the land.　　　　　　　　　　　　　　　　

A. number;　 has　 B. quantity; has　 C. number; have　 　D. quantity; have

30. Is this science lab ___ some foreign experts visited last Friday?　　　　　　　

A. that　　 B. where　 C. which　 D. the one

29.Being examined twice a year is the rule that every driver 　　　obey in the city .

　 A. shall　 B. can　 C. ought　 to　 D. need

28. _　 we left the building that I realized　 how dangerous the situation had been.

　　 A．Only then　　 B．It was only then C．Only after　 D．It was only after

27. -- What do you think of David ?

-- There are some things that are not easy to　 　　　　　　, and　 hiscoldness　 is one .

A. put aside　 B. put up with　 C. think of　 D. get along with

26.The question came up at the meeting 　　　　we had enough money for our research.

A. that　 B. what　 C. which　 D. whether

25.　　　　 　the　 weather ,the sports meet will be held on time .

A. Instead of　 B. In　 relation　 to　 C. Regardless of　 　D. In favor of

24.In front of the farmhouse ______.

A．lay a poor man　　　　　　 B．laid a poor man

　 C．a poor man lay　　　　　　 D．did a poor man lie

23.＿＿＿＿ Sunday, the students are at home. A. Being　 　　　B. To　 be　 　　　C. It is　 　　　　D. It being

22.Most animals　 have　 little　 connection　 with animals of a different　

kind , 　　　　　they hunt them for food .

　A. if　　　　 B while　　　　　　 C. unless　　　　　　 D. as