-Iamwornoutnow.Istayeduplastnighttofinishthereport.-Oh?You.Theprofessoraskedustohanditinnextweek.()A.needn'thaveB.wouldn'thaveC.couldn'thaveD.can't
-I am worn out now.I stayed up last night to finish the report.
-Oh?You ______.The professor asked us to hand it in next week.( )
A. needn't have
B. wouldn't have
C. couldn't have
D. can't have
本题是两人之间的对话,选项中有语义省略的现象,have后面省略了"stayed up last night to finish the report".need not have done表示过去已做…事了,但事实上没有必要做.wouldn't have done它表示的是与过去事实相反之假设的结果,意思是"(过去)当时就不会做…了",而实际上做了…;cannot have done/couldn't have done这两个形式表示推测,意思是"过去应该不可能做…".根据句子所表达的意思和下文的语境"The professor asked us to hand it in next week."可知答案选A.
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