题目内容

----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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