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问题详情

Potential subjects should be informed of the research and _______ an opportunity to decide if they want to participate。

A、gave

B、giving

C、give

D、be given

时间：2021-07-24 01:27 关键词：

答案解析

D
考查动词的语态。后半句的主语是代词they，谓语动词是give，根据句意应是“他们被提供机会决定是否要参与研究”，故用被动语态。

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