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    1、（2011·重庆师大附中月考）While he was investigating ways to improve the telescope, Newton made ________ discovery which completely changed ________ man’s understanding of color.

    A. a; 不填                 B. a; the                   C. 不填; the               D. the; a

    1、A考查冠词的用法。第一空表示“一个发现”；第二空understanding of color已有限定词man’s，故不用冠词。

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    （2011·重庆师大附中月考）While he was investigating ways to improve the telescope, Newton made ________ discovery which completely changed ________ man’s understanding of color.

    A. a; 不填                 B. a; the                   C. 不填; the               D. the; a

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