While he was investigating ways t improve the telescope Newton made _______disco

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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

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”。

举一反三

______ polar bear population is ______ sensitive topic for the Canadian government, which allows limited hunting.

A．A; the

B．A; a

C．The; the

D．The; a

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Every spring, the park becomes ______ colourful place with lovely flowers everywhere, which is ______ absolutely fantastic sight.

A．the; the

B．a; an

C．a; the

D．the; an

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The radio club in our school, which is in ______ charge of Hao Zhe, is much more than just ______music for everyone.

A．/; /

B．/; the

C．the; /

D．the; the

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It makes _______ big difference to keep calm when giving _______ first aid.

A．a, /

B．/, the

C．a, the

D．/,a

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At present, how we can look after ______ old is becoming ______ hot and severe issue.

A．the, a

B．a, the

C．a, a

D．the, the

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