问题
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
答案：A
考查短语动词意义区别。Break down“出毛病，失败；分解”；break out “突然发生，爆发”; break up “驱散，分解”; break in “闯入；插话”.根据题意：当他正在因特网上搜寻信息时，电脑系统突然出现了故障。可知答案为A.