◎ 题干
I ________ have used the computer without asking you first. 
[     ]
A. mustn't      
B. needn't      
C. shouldn't      
D. can't
◎ 答案
查看答案
◎ 解析
查看解析
◎ 知识点
    根据魔方格专家分析,试题“I ________ have used the computer without asking you first.[ ]A. mustn't B. needn't C. shouldn'tD. can't…”主要考查了你对  【情态动词】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。