组卷网 > 初中英语综合库 > 语法 > 动词 > 情态动词 > must > must否定表示禁止
题型:单项选择 难度:0.65 引用次数:58 题号:8928419
For the safety of all the passengers,objects like guns,knives or fireworks         be carried onto trains,planes or coaches.
A.mayB.needn'tC.shouldD.mustn't

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