【题目】I was really worried about you. You _______________ home without a word.
A. mustn’t leave B. shouldn’t have left
C. couldn’t have left D. needn’t leave
在线课程【答案】B
【解析】
试题分析：B；考查情态动词。mustn't do sth 是指禁止做……，shouldn’t have done本不应该做……，couldn’t have done本不能做……，needn't do 不需要做……；句意：我真的很担心你。你本不应该不说一声就回家的。故选B