问题补充：
The computer system has .
A. broken out
B. broken down
C. broken into
D. broken away
答案：
A. broken out
(答案→)B. broken down
C. broken into
D. broken away
解析：词义辨析题。电脑系统瘫痪了。A. broken out爆发B. broken down 出故障C. broken into闯入D. broken away 挣脱根据语境选B
1000字范文，内容丰富有趣，学习的好帮手！
