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----Mum, ____ I watch TV now? 
----No, you ____. You _____ finish your homework first.
A.may; can’t; mustB.can; can’t; may
C.must; needn’t; mustD.may; mustn’t; can
A
表示征询对方许可可用单词may或can,故不选C,回答是不可以而不是不准的
意思,故不选D,你不需要完成作业是要求或命令,表示此概念用must,故不选
B,只能选A。
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