考试
2020-03-16 06:26:17

7590 Each of the mechanical de

题目描述

Each of the mechanical devices ______ its task as though nothing ______ wrong.A.perform, i



Each of the mechanical devices ______ its task as though nothing ______ wrong.

A.perform, is

B.perform, are

C.performs, is

D.performs, are

请帮忙给出正确答案和分析,谢谢!

答案解析

C本题考查主谓一致,两处主语分别是eac

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