－When did your father come back last night?－He didn’t come back he finished all the work.A

问题补充：

－When did your father come back last night?

－He didn’t come back he finished all the work.

A. until

B. while

C. if

D. that

答案：

A. until

B. while

(答案→)C. if

D. that

解析：通过句意，本句的意思应该是“他没有回来，直到他完成了所有的工作。”所以本题应该选择A。while表示“当…时候”，if表示“如果”，that做引导词时，没有意思。Until表示“直到……才”。所以本题选C。