It was recommended that passengers___ smoke during the flight.

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问题 It was recommended that passengers___ smoke during the flight.

选项 A、not
B、need not
C、could not
D、would not

答案A

解析与recommend相关的名词性从句中要使用虚拟语气，从句中使用“should+动词原形”，should可以省略。

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A类竞赛（研究生）

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