题目内容

The computer system broke _____ suddenly while he was searching for information on the Internet.
A.downB.outC.upD.in
A
考查动词搭配:break down崩溃,垮掉,break out“爆发”,break up分手,解体,break in闯入,句意是:当他在网上搜索信息时,电脑系统突然崩溃了。选A.
.
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