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While he was investigating ways to improve the telescope Newton made _______discovery which completely changed ____ man’s understanding of color.
a ,/     B. a ,the     C. /, the     D. the ,a
A
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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