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-Why are you looking so worried? Is there anything I can do for you?
-The computer        break down when I nearly finished my composition.
A.can B.should C.must D.dare
C

试题分析:考察情态动词辨析。Can可能;should应该;must必须,一定,非得,偏偏;dare敢;句意:—为什么你看上去如此担忧?我可以为你做什么?—当我写完作文的时候,计算机偏偏在那个时候坏了。根据句意说明must表示的是偏偏。故C正确。
点评:在平时的学习中既要注意情态动词的基本含义,也要注意情态动词的特殊意义,如must偏偏,非得;should竟然;mustn’t禁止,千万不能;等等。情态动词Shall用于所有人称,表示命令,警告,允诺;以及法律规定中要做的事情。
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