—MayIwatchTVnow,Mum?—No,you        .Youmustcleanyourroo...

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问题详情:

—MayIwatchTVnow,Mum?—No,you        .Youmustcleanyourroo...

—May I watch TV now,Mum?

—No,you         .You must clean your room first.

         A.may not        B.needn't

         C.can't           D.mustn't

【回答】

C

知识点:情态动词

题型:选择题

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