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补全对话。 A: 1 . B: Hello, I'm Jack Brown. A: Nice to meet you. B: 2 . A: Is this your friend? B: Yes. A: What's his name? B: 3 . A: Hi! C: Hi! Here's my name card. A: 4 . A. Nice to meet you. B. Hello, what's your name? C. Thanks. D. His name is Tom Green