Recentlypeoplehavemadegreatprogressinusing 国语站 题库 1.17W 大中小设置文字大小 问题详情： Recently people have made great progress in using ____ power of nature to produce____ electricity. A. a; the B. /; / C. the; / D. a; an【回答】C知识点：冠词题型：选择题 TAG标签：#
