问题
单项选择题
The computer system（）suddenly while he was searching for information on the Internet.
A.broke down
B.broke out
C.broke up
D.broke in
答案
参考答案：A
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The computer system（）suddenly while he was searching for information on the Internet.
A.broke down
B.broke out
C.broke up
D.broke in
参考答案：A