It was on the farm ________ he spent his childhood he learned how to grow vegetables．

1. A.
   where; that
2. B.
   which; when
3. C.
   that; that
4. D.
   which; which

It was on the farm _____ he spent his childhood ______ he learned how to grow vegetables.

A. where; that    B. which; when       C. that; where           D. which; which