Y were brave enough to raise objections at the meeting.Well,now I regret ____that.A to do B to be doing C to have done D having done 大虾们，能不能具体点呀 第一个句子是过去时，后面个句子又是现在时，里面再加个have done 过去分词之类的完成时,晕类！
问题描述：
Y were brave enough to raise objections at the meeting.Well,now I regret ____that.
A to do B to be doing C to have done D having done
大虾们，能不能具体点呀 第一个句子是过去时，后面个句子又是现在时，里面再加个have done 过去分词之类的完成时,晕类！
答
选c 意思是在会议上你有足够的勇气提出异议，现在我真后悔那样做
答
A
答
regret doing后悔做过某事，事情发生在regret之前，regret to do当时或现在遗憾的做什么，这个动作已经发生所以选D
答
about
答
D：having done
“你在会上提出反对意见很有勇气,现在我很后悔那样做了.”