While he was investigating ways to improve the telescope Newton made_____discovery which completely changed_____man’ s understan

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问题 While he was investigating ways to improve the telescope Newton made_____discovery which completely changed_____man’ s understanding of color.

选项 A、a ; /
B、a ; the
C、/; the
D、the ; a

答案A

解析 make a discovery有了一个发现;man’s understanding of color人类对于颜色的理解,在物主代词,名词所有格前,一般不用加冠词,man用单数形式,前面不加冠词,可以表示“人类”。
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