Shanghai has hosted world Expo. The world Expo has long history but it has never been

问题补充：

Shanghai has hosted world Expo. The world Expo has long history but it has never been held in Asia.

A. ——；a

B. the ; a

C. the ; the

D. / ; /

答案：

A. ——；a

(答案→)B. the ; a

C. the ; the

D. / ; /

解析：本题考查冠词。the world Expo特指世博会；a long history一个很长的历史。根据句意选择B。