第二部分：英语知识运用（共两节，满分45分）
第一节单项填空（共15小题；每小题1分，满分15分）
21. As we know, Potala Palace, a bination of Tibetan construction art and culture, is considered precious treasure of China.
A. a; a
B. the; a
C. the; the
D. a; the
网友回答
A. a; a
(答案→)B. the; a
C. the; the
D. a; the
解析：可联系答.案.网客服索取。