31.Because people had no idea ______, I was able to see _____ on the ground.

A. who I was; what were their problems

B.　　 who I was; what their problems were

C.　　 who was I; what their problems were

D.　　 who was I; what were their problems

30.It is _____ waste of time for young people to devote themselves to playing computer games on ____ Internet only for ____ pleasure.

　 A./, the, /　　 B. the, the,/　　 C. a, the , a　　 D. a , the, /

29.The reason ____ Spielberg mentioned for the success of his movies was that he explored into the mysteries of human lives.

　 A. why　　 B. what　　 C. for which　　 D /

28. In Canada, he made a lot of friends _____ English well to make himself_____ .

A.　　 learn, understand　　　 B. to learn, understood　

C. learning, understand　　 D. learned, understood

27.Don’t let him leave the lab ____ he is not ready to.

　 A. if　　　　　　 B. unless　　 C. though　　 D. till

26.－Why not collect money for those infected with AIDS?

　­－ That ____ a wonderful idea!

　 A. is sounded　　 B. sounds　　 C. is heard　　 D. hears

25. ―Can I help you, sir?

　 －Yes, I bought this Mp3 here yesterday, but it _____ .

　 A. didn’t work　　 B. won’t work　 C. can’t work　 D. doesn’t work

24.In the past several weeks, many villages and towns in Florida ______ by the Hurricane Ivan.

A.　　 destroyed　　　　　 B. were destroyed

　　 C. have destroyed　　　 D. have been destroyed

23.Is _______ some German friends visited last week?

　 A. this art center where　　　 B. this art center one

　 C. this the art center　　　　 D. this art center

22. The patient was warned _____ oily food after the operation.

　 A. to eat not　　 B. eating not　 C. not to eat　 D. not eating