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    【题目】My brother bought a telescope, ______ he could study the star in the night sky.

    A.of whichB.through whichC.in whichD.on which

    【答案】B

    【解析】

    考查定语从句。句意：我哥哥买了一架望远镜，通过它他可以研究夜空中的星星。介词through 表示“通过/凭借（某种方式/方法）”；短语through the telescope意思为“通过望远镜”。分析句子结构，“______ he could study the star in the night sky是非限制性定语从句，先行词是a telescope，指物，作介词through的宾语，因此用“介词through+which”引导非限制性定语从句。故选B项。

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