He didn’t make clear when and where the meeting would be held. . A. this B. that

He didn’t make ________ clear when and where the meeting would be held. .

A. this             B. that                             C. it                             D. these

试题答案

C

解析:

考查it作形式主语，it代替when and where the meeting would be held其他选项均不可以充当形式宾语。