题目内容

1、（2011·重庆师大附中月考）While he was investigating ways to improve the telescope, Newton made ________ discovery which completely changed ________ man’s understanding of color.

A. a; 不填                 B. a; the                   C. 不填; the               D. the; a

试题答案

1、A考查冠词的用法。第一空表示“一个发现”；第二空understanding of color已有限定词man’s，故不用冠词。