问题补充:
The computer system suddenly while he was searching for information.
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:句意,当他正在寻找信息的时候,电脑系统突然坏掉了。break down(机器)出故障break out(战争、火灾等)突然发生,爆发break up分裂break in打断,故选A.