题目内容

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; has seen
B. have been; have seen
C. had been; had seen
D. have been; had seen

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They were discussing over the plan of____________. ( invest)

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America has been a force for peace and prosperity in every corner of the __________. (global)

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