【題目】【2012黔東南州】We can't pass the exam, ___________we study hard.

A. because B. and C, unless D. or

【答案】C

【解析】

試題分析：pass the exam和study hard存在一種條件關(guān)系，“如果努力學(xué)習(xí)你就會通過這次考試；如果不努力學(xué)習(xí)，你就不會通過這次考試”，故根據(jù)句意可知選C。

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