选择合适的句子补全对话。

A. Do you want to be my friend? B. Where are you from, Li Lin? C. Good morning, John. D. He's a new student. E. OK.

John: Good morning, Mike.

Mike:

John: This is Li lin, Mike.  

Mike: Welcome!

Li Lin: I'm from Beijing.  

Mike: Sure.

Li Lin: Let's play teacher and student.

Mike and John: