Nothing in this world is a gift．________ has to be learned must be learned the hard way．

1. A.
   Whatever
2. B.
   No matter what
3. C.
   Whichever
4. D.
   No matter which

 Nothing in this world is a gift．________ has to be learned must be learned the hard way．

       A． Whatever         B． No matter what                                 C． Whichever       D． No matter which