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

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；/

B. an；the

C. an；/

D. the；the

答案：

A. the；/

(答案→)B. an；the

C. an；/

D. the；the

解析：考查冠词。Interest抽象名词具体化表示一个让人感兴趣的人/事；第二空是特指中国的历史。结合句意可知B正确。句意：自从上海世博会以来，中国文化已经成为全世界人民都感兴趣的一个事物了，很多外国人都想知道中国历史。