If you want to find some information about a foreign country, you can ask your friends _______ have been to that country.

1. A.
   whom
2. B.
   which
3. C.
   who
4. D.
   whose

 If you want to find some information about a foreign country, you can ask your friends _______ have been to that country.

A. whom              B. which              C. who            D. whose