We first met on a train in 2000. We both felt immediately that we each other for

We first met on a train in 2000. We both felt immediately that we ______ each other for years.

A. knew                  B. have known            C. had known               D. know

试题答案

C

解析:

C用过去完成时，有过去时间2000，表达过去的过去。