31. So quickly are science and technology advancing_________ is a possibility today may be a reality tomorrow.

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

30. In the past few years, “My Heart Will Go On” was a popular song among young people, __________ were often heard singing it at parties.

　 A. who　　　 B. which　　　　 C. they　　　　 D.that

29. The boy dived into the water and after __________ seemed to be a long time,he came up again.

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

28. ---- Several department stores, including the one we usually go to, _____ sidewalk sales this week.

　 ---- Let’s go and have a look.

　 A. is having　　　 B. are having　　　 C. has　　　　 D. have had

27. _____ for a long time, but he tried his best to make up for what he missed.

　 A. Being ill staying in hospital　　 B. Having been ill staying in hospital

　 C. He was ill staying in hospital　　 D. To be ill staying in hospital

26.--- Put these glasses away before they __________.

　 --- OK. I will put them in the cupboard.

　 A. have broken　　 B. are breaking　　　 C. get broken　 D. will be broken

25. It is ______ the old clock that the old man spent the whole afternoon with me yesterday afternoon.

　 A. to repair　　　　 B. repairing　　　　 C. repair　　　 D. repaired

24. The food, ____________good, was soon sold out when it was taken to the market.

　 A. tasted　　　　　 B. being tasted　　 C. tasting　　　 D. having tasted

23. ---- How long _____ you ______ in the country with your uncle, Henry?

　 ---- About two weeks. I’ll return as soon as school starts.

　 A. had; stayed　　　 B. are; staying　　 C. did; stay　 　D. do; stay

22. ---- Who ________it be that hasn’t handed in his homework?

　 ---- It ______ be Bob. He handed it in yesterday.

　 A. can;mustn’t　　 B. must; can　　　 C. can;can’t　　　 D. may;must