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Whenthelightisred,you     crosstheroad.You     waitfort...

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问题详情:

Whenthelightisred,you     crosstheroad.You     waitfort...

When the light is red, you      cross the road. You      wait for the green light.

  A. can; must  B. can; must not  C. can’t; must  D. can’t; must not

【回答】

C

知识点:情态动词

题型:选择题