【题目】 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
在线课程【答案】A
【解析】
试题分析：A考查动词短语辨析。A.broke down分解，发生故障；B.broke out爆发，突发；C.broke up打碎，破碎；D.broke in打断，闯入；分析句意：他上网搜集信息时，电脑系统突然发生了故障。故答案为A选项。