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【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

【答案】A

【解析】句意:当他正在互联网上搜索信息时,计 算机系统出了故障。break down意为“(机器等)出现故障”,符合句意。break out“(战争、火灾等)突然发生”;break up“解散;驱散”;break in“闯入”。

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