— I'll come to listen to your speech at 9:30 tomorrow morning.— I regret to tell you that

— I'll come to listen to your speech at 9:30 tomorrow morning.
— I regret to tell you that by then my speech .
A. had ended
B. has ended
C. will have ended
D. will end

A. had endedB. has ended(答案→)C. will have endedD. will end解析：本题考查时态。句意：——明天早上九点半我将来听你的演讲。——我很遗憾地告诉你，到那个时候我的演讲已经结束了。句中by then指的是by 9:30 tomorrow morning，表示在将来某一时间以前已经完成的动作，要使用将来完成时，所以答案为C项。

我学会了