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【题目】All passengers_____ go through safety check before they take a plane.

A.mayB.canC.mustD.need

【答案】C

【解析】

句意:所有乘客在乘坐飞机前必须经过安全检查。

考查情态动词辨析。may可以,表许可或请求;can能,表能力或许可;must必须,指一定;need需要,指有必要。根据句意语境可知,安检强调“必须,一定”,故选C

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