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

A．knew

B．have known

C．have known

D．know

钢丝绳在使用过程中会不断的磨损、弯曲、变形、锈蚀和断丝等，不能满足安全使用时应予报废，以免发生危险。