31．Scientists say it may be five or six years _______ it is possible to test this medicine on human patients.

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

30．It was a pity that the great writer died _________his works unfinished.

　　　　　　 A．for　 B．with　　　　　　 C．from 　　　　　 D．of

29．The number of people present at the concert was _______than expected .There were many tickets left.

　　　　　　 A．much smaller　　　　　 B．much more　 C．much larger D．many more

28．-How do you　　 　　　we go to Beijing for our holidays?

-I think we'd better fly there. It's much more comfortable.

　　　　　　 A．insist　　　　　 B．want　　　　　　 C．suppose 　　 D．suggest

27．The news reporters hurried to the airport, only________ the film stars had left.

　　　　　　 A．to tell　　　　　 B．to be told　　 C．telling　　　　　 D．told

26．I'd like to buy a house-modern, comfortable, and _______ in a quiet neighborhood.

　　　　　　 A．in all　　　　　　 B．above all　　　 C．after all　　　　 D．at all

25．-Go for a picnic this weekend, OK?

-_______ .I love getting close to nature.

　　　　　　 A．I couldn't agree more 　　　　　 B．I'm afraid not

　　　　　　 C．I believe not 　　　　　　　　　　　 D．I don't think so

24．She has set a new record, that is, the sales of her latest book ________ 50 million.

　　　　　　 A．have reached　　　　　　 B．has reached　 C．are reaching D．had reached

23．It is ________world of wonders,　　　　 world where anything can happen.

　　　　　　 A．a ;the 　　　　 B．a; a 　　　　　　 C．the ; a　　　　　 D．不填；不填

22．-Which of the three ways shall I take to the village?

　　　　　　 -_________ way as you please.

　　　　　　 A．Each　　　　　 B．Every　　　　　 C．Any 　　　 D．Either