题目内容

【题目】Bill won't make any process ________ he studies harder than before.

A.ifB.whenC.becauseD.unless

【答案】D

【解析】

句意：除非Bill 学习比以前用功，否则他不会取得任何进步的。

本题考查的是从属连词的辨析。if如果；when何时； because因为；unless除非。根据语境推测句意是“除非Bill 学习比以前用功，否则他不会取得任何进步的。”从句意来看，这里需要一个表假设的连词，主句用一般将来时从句用一般现在时说明后句是表假设的条件状语从句，结合选项，unless可以引导一个表假设的条件状语从句，意为“除非”，相当于if not。故选D。

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