Chinese culture has become interest for people all over the world since the Shanghai Exp

问题补充：

Chinese culture has become interest for people all over the world since the Shanghai Expo and many foreigners are discovering history of China .

A. the ; x

B. an ; the

C. an ; x

D. the ; the

答案：

A. the ; x

(答案→)B. an ; the

C. an ; x

D. the ; the

解析：考查冠词：第一空填an，泛指“一种兴趣’,第二空填the，特指中国历史，句意是：自从上海世博会中国文化是全世界很多人感兴趣的事，很多外国人正研究中国历史。选B。