- break up
break away from 摆脱；脱离
break down 机器出故障；崩溃; 瓦解
break in 破门而入；插嘴
break into the house破门而入
break one’s promise/word 食言
break out 战争、火灾等爆发
break into laughter 突然大笑
break through 突破；穿过
break off the conversation/relations中断交谈/关系
The police tried to break up the crowd.
The car is always breaking down.这辆车老是出毛病。
Children shouldn’t break in on adults’ conversation.
The couple had quarrelled all time before they their engagement.
- broke down B. broke through
- broke off D. broke out
解析：选C。句中quarrel暗示了“中断婚约”。break off the conversation/relations中断交谈/关系。