   neutral   How do you do, Prof.Smith.     happiness   How do you do, Ms. Yang.You speak very good English.  
    happiness   Thank you. I begin to like English even when I was a child.     neutral   Where did you learn it?  
    neutral   At school, in China.This is my first time to be out of my own country.     surprise   
 Really? You have done much better. 
 You have only lived two years here!    disgust But now, the life style