Potential subjects should be informed of the research and______ an opportunity to decide if they want to participate.

admin2017-02-25  28

问题 Potential subjects should be informed of the research and______ an opportunity to decide if they want to participate.

选项 A、gave
B、giving
C、give
D、be given

答案D

解析 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。
转载请注明原文地址:https://kaotiyun.com/show/qb3v777K
0

最新回复(0)