He had to pause from time to time to wipe the sweat from his forehead, because the air-conditioning system .A．broke inB．broke upC．broke outD．broke down 题目和参考答案——青夏教育精英家教网——

题目内容

He had to pause from time to time to wipe the sweat from his forehead, because the air-conditioning system ____.

A．broke in

B．broke up

C．broke out

D．broke down

D

试题分析：句意：他不时的停顿擦前额的汗，因为空调系统出故障了。四个选项的意思是：A. broke in闯入，插话，B. broke up 分手，解体，C. broke out 爆发，D. broke down崩溃，破裂，出故障，所以选D。

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