Question

【题目】— Can I have the day off tomorrow ?

— Unless you _______ your task at hand.

A. will complete B. have completed

C. had completed D. completed

Answer 1

【答案】B

【解析】句意：---明天我可以请假吗？----除非你完成了你手头的工作。Unless引导的时间状语从句用一般现在时代替将来时，排除A。因为题干说的是明天的事情，应用现在。故选B。