I regret

Question

A.to inform B.informing C.to have informed D.having informed

Answer 1

regret 遗憾 后+to sth 很遗憾做。。如：
I regret to tell you that my brother died yesterday afternoon.
regret 后悔 后+doing sth 因……而感到后悔。。如：
I regret telling you the news.
inform 有 通知、告诉的意思~所以还要看后面的语境~
楼主这一题应该不全吧~

Answer 2

I wish I will be a movie star and I regret giving up acting 3 years ago. I wish I have a chance to be an actor again and I regret