问题补充:
单选题Hehadtopausefromtimetotimetowipethesweatfromhisforehead,becausetheair-conditioningsystem______________.A.broke inB.broke upC.broke outD.broke down
答案:
D解析考查动词短语辨析。break in打断; 闯入; 开始工作;break up结束,散开;分解;break out爆发;break down崩溃,垮掉;出毛病;抛锚。题干意思是:他时不时地停下来擦去额头的汗水,因为空掉出毛病了。选D。