After years of overwork my father’s health and he had to retire from business.A. broke o

问题补充：

After years of overwork, my father’s health and he had to retire from business.

A. broke out.

B. broke up.

C. broke down.

D. broke off.

答案：

A. broke out.

B. broke up.

(答案→)C. broke down.

D. broke off.

解析：句意：多年的过度工作之后,我父亲的身体垮了，不得不从岗位上退休了。

break out (战争,灾难等的)爆发；break up 结束;解散；break down (身体等的)垮掉;(机器的)出故障；break off折断；突然停止，暂停. 根据句意，故选C。