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

— Unless you _______ your task at hand.

A. will complete B. have completed

C. had completed D. completed

【答案】B

【解析】句意：---明天我可以請假嗎？----除非你完成了你手頭的工作。Unless引導的時間狀語從句用一般現(xiàn)在時代替將來時，排除A。因為題干說的是明天的事情，應用現(xiàn)在。故選B。

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