John and I_________ friends for eight years.We first got to know each other at a Christmas party.But we________ each other a couple of times before that
A.had been； have metB.have been； have metC.had been； had metD.have been； had met在线课程D
解析：
for+时间段表示从过去某时延续至今的动作或状态，用现在完成时；
meet发生在got to know 这一过去动作之前，用过去完成时。