Mr. Zhao Jiping, _____ composer from Shaanxi Province, was elected _____ chairman of the Chinese

Musicians Association, a national professional trade organization whose mission is to provide a forum

for the advocacy of Chinese music and to promote public awareness of music. [ ]

A. a; the

B. the; a

C. a; 不填

D. the; 不填

雄伟壮观的长江三峡其成因与下列哪个地貌的成因相似（）

A.阿尔卑斯山

B.撒哈拉沙漠

C.尼亚加拉大瀑布

D.冲积扇