That must be a long way _________ we were

A.in which

B.from that

C.from there

D.from where

答案及解析： D

解析：

考察宾语从句。Where we were是介词from的宾语.where引导起这个宾语从句。句意：从我们所在的地方到那儿，肯定有很长的距离。