— I regret you that you failed the exam— How I regret so much time playing computer g

问题补充：

— I regret you that you failed the exam.

— How I regret so much time playing computer games.

A. telling; wasting

B. telling; to waste

C. to tell; wasting

D. to tell; to waste

答案：

A. telling; wasting

B. telling; to waste

(答案→)C. to tell; wasting

D. to tell; to waste

解析：考查固定搭配。I regret you that you failed the exam中regret是遗憾的意思，很遗憾要做某事，用regret to do sth.结构，排除A,B；How I regret so much time playing computer games中regret是后悔做了某事，用regret doing sth.结构。所以选C。