问题
选择题
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
答案：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”。
创伤