从下面方框中的A-E选项中,选择适当的句子,将对话补充完整。 A. Nice to meet you, too! B. Is this your sister? C. Jack, this is my friend, Tom. D. What's her name? E. No, it isn't. A: Hi, John! B: Hi, Tom! A: 1 B: Yes, it is. A: 2 B: Gina. A: Nice to meet you, Gina! C: 3 A: Is that your brother? B: 4 It's my cousin Jack. (这时杰克走了过来) 5 D: Hi, Tom! A: Hi, Jack!