Question

【題目】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：他時不時地停下來擦去額頭的汗水，因為空調出毛病了。A.break in“打斷， 闖入，開始工作“；B.break up”結束，散開，分解“；C.break out”爆發“；D.break down”崩潰，垮掉“。根據句意，選D。