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.
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C解析试题分析：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。考点：考察动词词组的辨析。
点评：平时多积累多记忆。