--When did your father come back last night?He didnt come back he finished all the wo

问题补充：

--When did your father come back last night?

--He didn come back he finished all the work.

A. until B. while C. if

答案：

解析：句意：你的父亲昨天晚上什么时间回来的？直到他完成了所有的工作他才回来。not…until…，直到···才···，故选A。