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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(gè)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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