—When did you finish your homework last night?—A bit late my father came back home from

问题补充：

—When did you finish your homework last night?

—A bit late, my father came back home from work.

A. though

B. unless

C. if

D. until

答案：

A. though

B. unless

C. if

(答案→)D. until

解析：though虽然，尽管；unless除非，如果不；if是否，如果；until直到。句意：昨晚你什么时候完成的你的作业？——有点晚了，一直到我父亲下班回家。结合语境可知选D。