For holidays, many people visit the Great Barrier Reef off the northeast coast of Australia, ________ has more than 600 islands．

1. A.
   where
2. B.
   that
3. C.
   which
4. D.
   there

For holidays, many people visit the Great Barrier Reef off the northeast coast of Australia, _________ has more than 600 islands.

A. where              B. that           C. which          D. there

For holidays, many people visit the Great Barrier Reef _____ the northeast coast of Australia, which has 700 islands. 

   A. on            B. in        C. to             D. off