While he was investigating ways t improve the telescope Newton made discovery which comple

While he was investigating ways t improve the telescope Newton made discovery which completely changed man’s understanding of color.
A. a ,/
B. a ,the
C. /, the
D. the ,a

(答案→)A. a ,/B. a ,theC. /, theD. the ,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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