【題目】All the passengers ______ show their passports before getting on the plane.

A.mustB.canC.mayD.need

【答案】A

【解析】

句意:所有乘客登機前必須出示護照。

考查情態(tài)動詞。must必須;can能夠;may可以;need需要;根據(jù)“show their passports before getting on the plane”登機前必須出示護照,這個是法律法規(guī),所以用必須,故選A。

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