您是哪位用英语怎么说

A: Professor Jorge here,how can i help you?我是乔治教授,可以为您做点什么呢?B: Professor Jorge,it\' s been a long time.乔治教授，好久不见。A: Who is speaking?请问您是哪位?B:I am your student from two years ago.我是您两年前的学生。A: I have over two hundr