They had quarrelled all the time before they their engagement.
A. broke off
B. broke through
C. broke down
D. broke out
网友回答
(答案→)A. broke off
B. broke through
C. broke down
D. broke out
解析：考查break动词短语的词义辨析。break off 中断，解除；break through突破；出故障；break out 突然爆发。