Listen up, guys!Everyone ________ wear a mask. Go and buy one if you don’t have one.
- A.can’t
- B.can
- C.mustn’t
- D.must
正确答案及解析
正确答案
D
解析
句意：听着，大家！每个人都必须戴口罩。如果你没有，就去买一个。
考查情态动词。can’t不能；can可以；mustn’t禁止；must必须。根据“Everyone...wear amask. Go and buy one if you don’t have one.”可知，此处表示必须戴口罩，用must。故选D。
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