组卷网 > 初中英语综合库 > 语法 > 动词 > 情态动词 > must > must表示必须
题型:单项选择 难度:0.65 引用次数:77 题号:9545103
We        close that chemical factory because it has caused lots of pollution. We need a better environment.
A.mustB.canC.may
【知识点】 must表示必须解读

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