Now, the world’s focus is all on Shanghai ________ the 2010 world Expo is to be held．

1. A.
   when
2. B.
   whose
3. C.
   where
4. D.
   that

Now, the world’s focus is all on Shanghai ______ the 2010 world Expo is to be held.

          A. when               B. whose            C. where                   D. that

. Now, the world’s focus is all on Shanghai ______ the 2010 world Expo is to be held.

        A. when                   B. whose           C. where                D. that

Now, the world’s focus is all on Shanghai ______ the 2010 world Expo is to be held.

        A. when                   B. whose           C. where                D. that

 Now, the world’s focus is all on Shanghai ______ the 2010 world Expo is to be held.

    A. when           B. whose        C. where          D. that