⒈ A: Hello. This is A.
B: Hi. This is B.
⒉ A: This is Mr Chen and this is Ben.
B: Hello, Mr Chen.
C: Nice to meet you, Ben.
⒊ A: Good evening, Ben.
B: Good evening, Dad.
⒋A: Hello, Ben. My name is Jiamin.
B: Hi, Jiamin. Let 's be friends.
⒌A: Goodbye, Ben.
B: Goodbye, Mike.
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