31. He didn’t make____clear when and where the meeting would be held.

A. this　　　 B. that　 　　C. it　　　 D. these

30. _______ we admit that there are still some problems about NMET, we don't mean that it is of no use.

A. Until　　 　　　　　 B. While　　 　　　　　 C. As　　　 　　　　　　 D. Unless

29. China and the United States held their first strategic dialogue on August 1 and _______ to increase co-operation and constructive relations.

A. agreed　　 　　　　　　　　　　　　　　　　　　　　　　　　　 B. would agree

C. have agreed　　　　　　　　　　　　　　 D. had agreed

28. It’s reported that a plane with five people _______ crashed into the mountain several days ago.

A. on board　 　　　　　　　　　　　　　　　　　　　　　 　　　　B. on the board

C. in board　　　　　　 　　　　　　　　　　　　 　　　　D. in the board

27. --Why are your group so happy?

--Our group _______ theirs in the oral English competition.

A. has won　　　　　　　　　 B. have gained

C. has beaten　　　　　　　　　　　　　　　 D. have defeated

26. ______ to somebody, a British person often shakes hands with the stranger.

A. Introducing　　　　　　　 B. To introduce

C. To be introduced　　　　　 D. On being introduced

25. It was the hurricane ______ was called Katrina ______ destroyed the city of New Orleans.

A. which; that 　　　　　　　　　　　　　　 B. what; which

C. which; who 　　　　　　　　　　　　　　 D. that; which

24. _______, the gathering crowd burst into applause.

A. On entering the hall　　　　　　 B. When he took the floor

C. The speaker took his place　　　 D. No sooner had the speaker entered

23. AIDS is spreading all over the world at shocking speed. Where its dark _______ appears, we see pain, tears and death.

A. shape　　　　　　　　　 　　　 B. shadow　　 　　 C. ambition　　　 　　　 D. feeling

22. --Listen! Someone is knocking at the door.

--_______ be Mary. She has just been to Beijing

A. She mustn’t　　　　　　　 B. It can’t

C. It must　　　　　　　　　 D. She may