Her health under the pressure of work and she had to stay in hospital for a month.
A.broke up
B.broke down
C.broke out
D.broke away
网友回答
B解析词义辨析。broke up 分手，结束，打碎；broke down发生故障，身体垮掉；broke out战争，火灾的突然爆发；broke away摆脱，脱离。句意：她的健康在工作压力下垮掉了，她不得不在医院住一个月。所以选B。