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

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：考查动词短语辨析。句意：他在网上搜索信息时，电脑突然坏掉了。A出毛病，分解；B爆发；C分裂，解散，放假；D打断，闯入，插嘴。故选A。