A. are; are

　　B. is; is

　　C. is; are

　　D. are; is

　　31.What we have to admit is that never before ______ so greatly as today.

　　A. had Hefei changed

　　B. Hefei has changed

　　C. has Hefei changed

　　D. Hefei had changed

　　32. It’s too bad that I failed in the math exam. If only I ______ hard at it!

　　A. worked

　　B. had worked

　　C. has worked

　　D. would work

　　33.There is a lot for Sam to improve______he has achieved good results so far.

　　A. even though

　　B. as though

　　C. now that

　　D. so that

　　34.The TV play series The Revolution of 1911, broadcast on CCTV1 lately, is ______the 100th annversary of The Revolution of 1911.

　　A. in favor of

　　B. in honor of

　　C. in place of

　　D. in search of

　　35. Now, the world’s focus is all on_______it is that the global economy will come back to normal.

　　A. why

　　B. what

　　C. where

　　D.when

　　21.C 考查交际用语。问句是提建议的用语，因此应该用“That sounds great.”来接受对方的邀请。其它三项均不符合题意和语境。

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