【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(qǐng)假嗎？----除非你完成了你手頭的工作。Unless引導(dǎo)的時(shí)間狀語(yǔ)從句用一般現(xiàn)在時(shí)代替將來(lái)時(shí)，排除A。因?yàn)轭}干說(shuō)的是明天的事情，應(yīng)用現(xiàn)在。故選B。

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