—No wonder you caught a cold. You out last night without a coat.
—I know how silly I was.
A. shouldn’t have gone
B. mustn’t have gone
C. couldn’t have gone
D. mightn’t have gone
网友回答
(答案→)A. shouldn’t have gone
B. mustn’t have gone
C. couldn’t have gone
D. mightn’t have gone
解析：本题考查“情态动词＋have done ”结构的用。mustn’t have gone 是错误的表达，couldn’t have gone 和mightn’t have gone 虽然也有“本不应该做却做了”含义，但其语气远shouldn’t have gone 弱，且它们主要用来表示对过去是否发生某一行为进行推测。