摘要：( ) -I don’t think we have met before. -Yes, once at a party, but we . A. weren’t introduced B. didn’t introduced C. haven’t introduced D. weren’t introducing 答案: A
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— I don’t think we have met before.
— Yes, once at a party, but we _______.
A. didn’t introduce B. weren’t introduced
C. haven’t introduced D. weren’t introducing
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