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 有了一個(gè)發(fā)現(xiàn)；man’s understanding of color人類對(duì)于顏色的理解，在物主代詞，名詞所有格前，一般不用加冠詞，man 用單數(shù)形式，前面不加冠詞，可以表示“人類”。
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