The computer system suddenly while he was searching for information on the Internet.A. bro

问题补充：

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：

(答案→)A. broke down

B. broke out

C. broke up

D. broke in

解析：短语辨析。A. 发生故障；失败 B.爆发 C. 打碎；结束 D.打断；闯入。句意：当他正在网上查找信息时，电脑系统突然出故障了。选A。