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【题目】________ you are very carefulyou will make plenty of mistakes and fail the exams.

A.ThoughB.IfC.UntilD.Unless

【答案】D

【解析】

句意:除非你非常细心,否则你会犯很多错误,考试不及格。

考查连词,Though尽管;If如果,是否;Until直到……时;Unless除非。观察句子应该是遵循主将从现的状语从句,主句是一般将来时,从句是一般现在时,再结合两个句子前后逻辑,应该是“除非……否则……”,故选D

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