—How is the debate of your essay?
—It ____ well, but I ____one of the key points.


  1. A.
    might work; hadn’t forgot
  2. B.
    needn’t have worked; forgot
  3. C.
    could have worked; forgot
  4. D.
    would work; hadn’t forgot
C
試題分析:句意:--你的論文答辯怎樣?--它本來進行地很好,但是我忘了其中的一個重點。needn’t have worked表示過去沒有必要做好,很顯然不符合語境;這里指過去本能進行地很好,所以用could have worked,多于回答者來說答辯已經(jīng)結(jié)束,忘記重要的內(nèi)容也是發(fā)生在過去,所以應(yīng)該用過去式,故選C。
考點:考查情態(tài)動詞的用法。
點評:本題難度適中。情態(tài)動詞是高中階段的重要的語法項目,需要考生掌握它們的不同的語法及區(qū)別,尤其是情態(tài)動詞的完成式表示對過去的推測,不同的情態(tài)動詞推測的可能性大小上不同,需要考生理解它們的不同的語法。
即學即練:—I heard the phone ringing in the office next door.
—You ________ it. They haven’t got a phone yet.
A.couldn’t hear        B.couldn’t have heard
C.didn’t hear           D.wouldn’t have heard
解析:B。由句意可知此處是對過去的事情表示推測,那么否定句用“can/could not+完成時”,故選B。
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