◎ 题干
Our computer ________ at nine this morning and we haven't been able to do anything.
[     ]
A. has broken down  
B. crashed
C. has gone wrong  
D. was out of order
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“Our computer ________ at nine this morning and we haven't been able to do anything. [ ]A. has broken downB. crashedC. has gone wrongD. was out of order…”主要考查了你对  【一般过去时】  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。