If Tim carries on working like this, he'll ________ sooner or later．

If Tim carries on working like this, he'll ________ sooner or later．

A.break down

B.give up

C.get down

D.hold on

答案及解析： A

解析：

break down（机械等）故障，毁坏，（人）身体出毛病，（健康）衰弱；

give up放弃；

get down下来；

hold on继续，持续。