A: Firstly, allow me to introduce myself.
题型：单项选择题
问题：
A: Firstly, allow me to introduce myself. My name is John Brown, manager of the company. B: ______
A．You must be mistaken. I don't know you at all.
B．Hello, Brown, I haven't seen you for ages.
C．Very nice to see you, Mr. Brown.
D．Hi, John! Welcome to our company.