Question

（2011·重慶師大附中月考）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

Answer 1

A考查冠詞的用法。第一空表示“一個發(fā)現(xiàn)”；第二空understanding of color已有限定詞man’s，故不用冠詞。