Recently people have made great progress in using power of nature to produce electricity.
A. a; the
B. /; /
C. the; /
D. a; an
网友回答
A. a; the
B. /; /
(答案→)C. the; /
D. a; an
解析：考查冠词：句意：最近人们在使用天然能源发电方面取得很大进步。第一空填the，the power of nature特指自然的力量，第二空不填，electricity是抽象名词，不加冠词，选C。