China’s economic development has made rapid progress in the past 20 years and young people have made great contribution to this progress.
A. /; a
B. the; a
C. a; a
D. /; /
网友回答
(答案→)A. /; a
B. the; a
C. a; a
D. /; /
解析：考查冠词。make rapid progress取得迅速的进步；make a great contribution to做出巨大的贡献。根据句意选A。