We _______ talk loudly when we see the sign "Be quiet" on the wall. [ ]A. must B. mustn&#0

题目简介

We _______ talk loudly when we see the sign "Be quiet" on the wall. [ ]A. must B. mustn&#0

题目详情

We _______ talk loudly when we see the sign "Be quiet" on the wall.
[     ]
A. must
B. mustn't
C. need
D. needn't
题型:单选题难度:中档来源:模拟题

答案

B

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