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Yousmokeherebecauseitisnosmokingarea.A.needn'tB.musn'tC.couldn;tD.don'thaveto急需

题目详情
You__________smoke here because it is no smoking area. A.needn't B.musn't C.couldn;t D.don't have
to
急需
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答案和解析
B.musn't
你不许在这里吸烟,因为这是无烟区.