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 hundred students a semester.Can you tell me your name?
我一个学期教两百多名学生,能告诉我你的名字吗?
B: This is,Lisa,Lisa brown.
我是丽莎，丽莎布朗。
您是哪位用英语怎么说?
1、Who is speaking/ Who is this您是哪位?
例句：
Hello ，who is this?
您好，请问哪位?
Hello，this is Pikachu speaking .
您好，我是皮卡丘。
2、May I ask who is speaking 请问您是哪位?
例句：
This is Pikachu，May I ask who is speaking ?
我是皮卡丘，请问您是哪位?
This is Lisa speaking,is Doctor Jorge free?
我是丽莎，请问乔治医生有空吗？
3、It' s been a long time. 好久不见。
例句：
It' s been a long time.，how have you been?
好久不见，最近过得怎么样?
