Question

【题目】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

Answer 1

【答案】D

【解析】句意：他不得不时不时地停下来擦额头上的汗，因为空调系统坏了。本题考查动词词组辨析。break in闯入，打断；break up打碎，散开；break out爆发；break down出故障。根据句意选择D项。