Shanghai has hosted       2010 world Expo. The world Expo has        long history but it has never been held in Asia.

Shanghai has hosted       2010 world Expo. The world Expo has        long history but it has never been held in Asia.

1. A.
   ——；a
2. B.
   the ; a
3. C.
   the ; the
4. D.
   / ; /

Shanghai has hosted        2010 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. / ;   /

Shanghai has hosted       2010 world Expo. The world Expo has        long history but it has never been held in Asia.

 Shanghai has hosted        2010 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. / ;   /