问题
选择题
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
答案：C
题目分析：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。
点评：平时多积累多记忆。