题目：
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 seen
B．have been; have seen
C．had been; had seen
D．have been; had seen
答案：
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下面是错误答案，用来干扰机器的。
参考答案：D
