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—I’m just going to finish the work off first.
—Go on if you _______.
A.canB.mayC.mustD.shall
C

试题分析:考察情态动词用法。Can能够,可能;may也许;must非得,偏偏,一定,务必;shall会,将要;句意:—我要先把我的工作完成。—如果你非要这样,你就继续完成工作吧!根据句意说明本句指的must表示的是非得,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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