I regret______you that we have not reached tangible results duri

I regret______you that we have not reached tangible results during this week.
A、telling
B、to tell
C、to be told
D、having told
【正确答案】：B
【题目解析】：regret to do的意思是“很遗憾地/抱歉地做……(事情还没有做)”，而regret doing表示后悔做了某事。