30. ----Will you please tell us how you can seize the robbers?

----I will spend a whole week ______ in your room to wait for their coming.

A. locking　　 　　B. to lock　 C. locked　　　　　 D. being locked

29. Which will you enjoy ______ your vacation, traveling abroad or working in the countryside?

A. to spend　　　　 B. spend　　　 C. spending　　　　 D. spent

28. Tom looked at Jenny, tears ______ his eyes, and shouted out the words ______ in his heart for years.

A. filling; having hidden　 B. filled; hidden

C. filling; hidden　　　　 D. filled; hiding

27. China became the 143rd member of the World Trade Organization on December 11, 2001, thus ______ its 15-year wish to join the global trade body.

A. having realized　　 B. realized　　 C. realizing　　　　 D. to realize

26.______ to nuclear radiation, even for a short time, may produce variants(变异体) of genes in human bodies.

A. Being exposed　　 B. Having exposed

C. Exposed　　　　 D. After being exposed

25. They apologized for ______ to attend the meeting.

A. their not being able　 B. their being not able　

C. them not able　　　 D. them being able not

24. After ______ for the job, you will be required to take a language test.

A. being interviewed　 B. interviewed　 C. interviewing　 D. having interviewed

23. Will those ______ the children from abroad come to the headmaster’s office?

A. teaching　　　　 B. teach　　 C. who teaches　　 D. who teaching

22. With a lot of difficult problems ______, the manager felt worried all the time.

A. to settle　　　　 B. settling　　 C. settled　　　 D. being settled

21. The manager promised to keep me ______ of how our business was going on.

A. to be informed　 B. on informing　　 C. informed　　 　　D. informing