We had just covered a distance of three miles the engine and the car came to a stopA. then

问题补充：

We had just covered a distance of three miles the engine and the car came to a stop

A. then; was broken

B. when; broke down

C. until; was failed

D. since; burst out

答案：

A. then; was broken

(答案→)B. when; broke down

C. until; was failed

D. since; burst out

解析：break down垮掉，坏掉。句意：我们刚走几英里车就因引擎坏掉而停了。由此可得知答案为B。