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

解析根据主句中的动词recommend可以判断，此句考查虚拟语气，从句中的谓语动词是动词原形，助动词would省略。因此正确答案是A。

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专业英语四级

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