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I don’t know her very well, ____I have met her socially on a couple of occasions.
A、so that
B、when
C、although
D、since
【正确答案】：C
【题目解析】：句意：我不太了解她，_____我在社交场合见过她几次。此处C符合题意，虽然我在社交场合见过她几次