--- You did very well at the meeting, Black.
--- Well, I regret that to the boss.
A. say
B. to say
C. said
D. saying
网友回答
A. say
B. to say
C. said
(答案→)D. saying
解析：考查非谓语动词：句意：--布莱克，你开会的时候做的很好，--哦，我后悔和老板说那些话了。Regret doing后悔做过了…，regret to do很遗憾要做，根据句意应该选D。