Smith regretted___to the meeting yesterday.

问题描述:

Smith regretted___to the meeting yesterday.
A not going
Bnot have been
C not to go
D not to be going 这道题的解析

C,regret to do sth.表示“因没做某事而后悔”
regret doing sth.表示“因做了某事而后悔”
依题意:他是因为没去开会而感到后悔.所以选C