His grandfather and grandmother _____Chongqing for 40 years. They like living there.

        A. have been in               B. have been to    

C. have gone to              D. have moved to 

His grandfather and grandmother _____Chongqing for 40 years. They like living there.

1. A.
   have been in
2. B.
   have been to
3. C.
   have gone to
4. D.
   have moved to

His grandfather and grandmother _____Chongqing for 40 years. They like living there.