You did very well at the meeting BlackWell I regret that to the boss.A. sayB.

问题补充：

--- You did very well at the meeting, Black.

--- Well, I regret that to the boss.

A. say

B. to say

C. said

D. saying

答案：

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。