问题补充：
The couple had quarreled all time before they their engagement
A. broke down
B. broke through
C. broke off
D. broke out
答案：
A. broke down
B. broke through
(答案→)C. broke off
D. broke out
解析：
根据句意：这对夫妇在断绝他们夫妻关系之前，老是吵个不停。break down发生故障 break though 突破 break off断绝，中断 break out爆发故选C
