— 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

造成30人以上死亡的事故属于（）。

A.特别重大事故

B.重大事故

C.较大事故

D.一般事故