Question

When and where to hold the meeting _ still unknown to us. A. are B. were C. is D. was

When and where to hold the meeting _ still unknown to us.
A. are B. were C. is D. was
为什么是C

Answer 1

When and where to hold the meeting _ still unknown to us.
A. are B. were C. is D. was
选项是C。
因为主语是【一个】不定式短语，表单数。
句意是：“在什么时候在什么地方举行这个会议，我们还不知道”。