You should not have said that to her. It hurt her.
--- I know. I regret .
A. to have done that
B. to do that
C. having done that
D. I have done that
网友回答
A. to have done that
B. to do that
(答案→)C. having done that
D. I have done that
解析：本题考查动词搭配。regret to do遗憾要做某事；regret doing = regret having done对做过的事情后悔。句意：——你本不应当对她说那些话，它伤害了她。——我知道，我很后悔那么做。