the man was under so much stress that he finally_____a broke down b broke up c broke out d broke in

c broke out 爆发。
根据句意，承担很大压力。c合适

亲， 选A broke down 用于表示 关系破裂，计划失败，神经衰弱
另外 breakdown 连起来 是个名词 ，有崩溃倒塌的意思
1 break down 破除，打破
his marriage broke down
Our car broke down
the teacher broke down the new boy's shyness

2 break up with sb 与某人分手
3 break out 爆发，突然发生
war, fighting, or disease breaks out
4 break in （通常指盗贼）闯入，破门而入 ；短语动词打断；插嘴
The thief had broken in through a first-floor window.
小偷是从二楼的窗户进入屋里的。
O'Leary broke in on his thoughts 奥利里打断了他的思路。

a broke down (人）身体出毛病，（健康）衰弱。
You/Your health will break down if you work too hard.你工作过度会损害身体
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a broke down
崩溃，感情失控

答案A． broke down “〔机械)坏了；(计划等)失败；(身体或精神)垮了；(感情控制不住)哭了”
the man was under so much stress that he finally broke down.
他背负着太多的压力以至于最后他身体(承受不了)垮了.
B.broke up “打碎,粉碎；(会议等)终止,结束”
C.broke out“爆发；突然发生；逃脱,逃走”
D.broke in“闯入；插嘴”

选A　broke down 精神崩溃

这个男人承受如此大的压力，以致于他最终精神崩溃

break up 分手，结束，打碎

break out 爆发，突发

break in 打断，闯入

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