---Where are you going to spend your summer holiday?
---I’ll go _____ it is already cool

1. A.
   what
2. B.
   that
3. C.
   whether
4. D.
   where

 —Where are you going to spend your summer holiday?

   —I’ll go _____ it is already cool.

     A. what      B. that          C. whether        D. where