I was really anxious about you. You home without a word.
A. mustn’t have left
B. shouldn’t have left
C. couldn’t have left
D. needn’t have left
网友回答
A. mustn’t have left
(答案→)B. shouldn’t have left
C. couldn’t have left
D. needn’t have left
解析：shouldn’t have left意思是：本不应该离开但实际上已经离开。