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    【题目】_____ he came to study in the university, he has made much progress in the study of English.

    A.WhileB.WhenC.SinceD.After

    【答案】C

    【解析】

    考查连词辨析。句意：自从来到大学学习以来，他在英语学习方面取得了很大进步。A. While当......什么时候，然而，却；B. When当......时候；C. Since 自从......以来；D. After在......以后。Since作为连词，意为“自从”时，后面如果是过去的时间状语，主句谓语动词要用持续性动词，常与现在完成时态、现在完成进行时态连用。故选C。

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