33. We ______ here at lunch time; we were delayed at the airport, though.

A. could be　　　　　　　　　　　 B. should be

C. must have been　　　　　　　　 D. would have been

32. The scientist delivered a report on ______ there was little snow last year in North China.

A. why　　　　　 B. that　　　　　 C. how　　　　　 D. what

31. With proper measures, the economy in China is beginning to _______ again.

A. rise up　　　　 B. pack up　　　 C. pick up　　　 D. take up

30. While many teachers have welcomed the efficient class, some are still ______ about its results.

A. sceptical　　　 B. explicit　　　 C. sensitive　　　 D. certain

29. There is a total ______ on drinking and driving for the sake of everybody’s safety.

A. control　　　　 B. command　　 C. desire　　　　 D. ban

28. Their valuables ______ in the hotel safe, the young couple went window-shopping.

A. depositing　　 B. deposited　　　 C. to deposit　　 D. having deposited

27. --Have you known each other for long?

--Not very long, ______ we started to work in the company.

A. after　　　　　 B. before　　　　 C. since　　　　 D. when

26. The government is trying to do something to _______ better understanding between the two countries.

A. promote　　　 B. raise　　　　　 C. appeal　　　　 D. arise

25. Iraq is faced with lots of trouble,______ the financial problem is not the worst.

A. which　　　　 B. with which　　 C. that　　　　　 D. of which

24. The telephone______ , but by the time I got indoors, it stopped.

A. had rung　　　 B. was ringing　　 C. has rung　　　 D. rings