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

A.where; that

B.which; when

C.that; that

D.which; which

答案及解析： A

解析：

先行词the farm 在从句he spent his childhood 中作地点状语，故选where；第二空后为强调句的其余部分，应由连词that连接。