21. ----Any news about Bill Clinton?

　　----He left power three years ago and has a little now and a little then been ______.

　　A. heard of since B. heard since C. heard before D. heard of before

　　解析：答句可改為I have heard of him a little now and a little then since he left power three years ago.→

　　He has a little now and a little then heard of since he left power three years ago.

　　22. Professor Liu has ________ teach psychology since he came to the Central China Normal University.

　　A. determination to B. been determined to C. been determining to D. determined to

　　解析：Since引導(dǎo)的時(shí)間狀語(yǔ)從句強(qiáng)調(diào)主句謂語(yǔ)動(dòng)詞動(dòng)作的持續(xù)性。

　　23. The idea for the new machine came to Mr. Baker ______ to his invention recently.

　　A. while devoting B. while devoted C. while he was devoted D. while devoting himself.

　　解析：while后主語(yǔ)及助動(dòng)詞不能省略，因?yàn)閮删渲髡Z(yǔ)不一致

　　Mr Baker thought of the idea for the new machine (B / D) to his invention recently.

　　24. How many of us ______ a meeting that is not important to us would be interested in the discussion?

　　A. attended B. attending C. to attend D. have attended

　　解析：attending a meeting that is not important to us做定語(yǔ)

　　25. I can _____ some noise while I’m studying, but I can’t stand very loud noise.

　　A. put up with B. get rid of C. have effects on D. keep away from

　　解析：從后面的stand可以推斷，這里用put up with 表示忍受

　　26. Before leaving home, make sure to turn off the electricity, lock the door, ______ the windows open.

　　A. and not to leave B. instead of leaving C. rather than leave D. and not leave

　　解析：lock和 turn都是不定式肯定形式lock 前省略了to ,但not to leave 是否定形式，to不可省

　　27. A mysterious illness, referred to as “ a typical phenomena”, has been brought under control, the government said on Wednesday, ______ no cause of it has been made public.

　　A. though B. when C. that D. because

　　解析：“盡管”沒(méi)有病例公布

　　28. Space exploration has been made ______ with the development of modern science and technology.

　　A. it possible B. it was possible C. that possible D. possible

　　解析:該句測(cè)試是make sb./ sth.+adj. 結(jié)構(gòu)，如果用A項(xiàng)，后應(yīng)用to do sth.，因?yàn)閕t是形式賓語(yǔ)，代替不定式。

　　With the development of modern science and technology, man has made space exploration possible.

　　29. We want such materials ________ can bear high temperature and pressure.

　　A. that B. as C. what D. which

　　解析such materials as 引導(dǎo)的是定語(yǔ)從句,as 在從句中作主語(yǔ);而such materials that 引導(dǎo)的是結(jié)果狀語(yǔ)從句，that 在從句中不充當(dāng)成分。

　　30. Hardly ___________the door when he rushed into the office out of breath.

　　A.I opened B. did I open C.I had opened D. had I opened

　　解析hardly 以及含有否定意義的副詞放在句首，句子用倒裝結(jié)構(gòu)。

　　hardly…when/ no sooner…than 用法相同。

　　31. You will see this product wherever you go.

　　A.to be advertised B.advertised C.advertise D.advertising

　　解析see+賓語(yǔ)+賓補(bǔ)(do/ doing/ done)

　　They discussed the plan they will see carried out the next year.

　　→They discussed the plan. They will see it carried out the next year.

　　32.The time is not far away modern communications will become widespread in China’s vast countryside.

　　A.as B.until C.before D.when

　　解析 句子可改為：The time when modern communications will become widespread in China’s vast countryside. when引導(dǎo)定語(yǔ)從句。

　　33. —I thought you wouldn’t mind.

　　—Well, as a matter of fact I ; but you should have asked me first.

　　A.did B.do C.won’t D.don’t

　　解析 省略句。As a matter of fact, I don’t mind. 從but…應(yīng)看出用否定

　　34. It doesn’t matter to me I miss my train, because there’s another one later.

　　A.that B.if C.unless D. when

　　解析if引導(dǎo)條件狀語(yǔ)從句(如果)。

　　35. I realize she can be very troublesome, but I think you should apologize for being so angry with her.

　　A.all the same B.once in a while C.in actual fact D.all the time

　　解析 用法如：---- I’m sorry that the shoes don’t suit me.

　　----- Thank you all the same.