He didn't make clear when and where the meeting would be held.A. thisB. thatC. itD. these

问题补充：

He didn make clear when and where the meeting would be held.

A. this

B. that

C. it

D. these

答案：

A. this

B. that

(答案→)C. it

D. these

解析：考查it的用法：it可以做形式宾语，句型：make it +adj+宾语从句，句意：他没有明确什么时候什么地方开会。It指代是when and where the meeting would be held这个宾语从句，选C。