----CanIwalkacrosstheroadnow,mum?----No,you
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问题详情:
----Can I walk across the road now, mum?
---- No, you_______. You have to wait until the light turns green.
A. couldn't B. shouldn't C. mustn't D. needn't
【回答】
C
知识点:情态动词
题型:选择题