1、（2011·重慶師大附中月考）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考查冠詞的用法。第一空表示“一個發(fā)現(xiàn)”；第二空understanding of color已有限定詞man’s，故不用冠詞。

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（2011·重慶師大附中月考）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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