题目内容

【题目】—Mom, can I watch TV now?
—No. Youwatch TVyou have finished your homework.
A.can't, if
B.mustn't, unless
C.may, unless
D.should, if

【答案】B
【解析】句意：—妈妈，我现在可以看电视吗？—不行，你不能看电视，除非你已经完成了你的家庭作业。根据句意可知，第一个空表示不能看电视，可以选择can't 不能或mustn't不要，;第二个空是除非…，unless除非，如果不。故应选B。

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