—We______talk loudly when we see the sign "Be quiet" on the wall. —Yes, you are right. We

题目简介

—We______talk loudly when we see the sign "Be quiet" on the wall. —Yes, you are right. We

题目详情

—We ______ talk loudly when we see the sign "Be quiet" on the wall.
—Yes, you are right.  We should be polite in public.
[     ]
A. must
B. mustn't
C. need
D. needn't
题型:单选题难度:偏易来源:模拟题

答案

B

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