Nobody knows for sure what effect the global warming have ______ our environment in the long term.

Nobody knows for sure what effect the global warming have _____ our environment in the long term.

A. of                   B. with             C. for          D. on

Nobody knows for sure what effect the global warming have ______ our environment in the long term.

1. A.
   of
2. B.
   with
3. C.
   for
4. D.
   on

Nobody knows for sure what effect the global warming have _____ our environment in the long term.

A. of                   B. with             C. for          D. on