answer: #Person2# tells #Person1# #Person2# always does exercise, so #Person2# always looks happy. #Person2# thinks Chinese students need more exercise to have a good memory and #Person2# suggests #Person1# do whatever #Person1# likes for exercise.
documents: #Person1#: I don't understand why you always look so happy, so energetic. It seems like you've got good news everyday. 
  #Person2#: Really? Do I look happy all the time? 
  #Person1#: All I know is you look quite differently from other teachers. 
  #Person2#: Oh, do you know why? Actually, it's easy. Because I always exercise. My exercise, I think, is very hard. I often feel very good after conquering these difficulties. I feel alive! 
  #Person1#: Oh, I know. I saw you doing pull-ups one time on the campus5 and some students trying to imitate you. 
  #Person2#: Yeah, they are doing it for fun. Seldom would people like my exercise. It's difficult and boring. 
  #Person1#: It's true. Many students do the exercise when they have to. We have P. E. once a week. 
  #Person2#: But I think Chinese students need to exercise more. Besides exercise will help them learn new things better. Don 't students want to have a good memory? 
  #Person1#: Of course. I didn't know that. I only know exercise makes bodies stronger. I should take some exercise then. Do you have any suggestions? 
  #Person2#: Well, do what you like to do. It can be anything. Jogging, doing aerobics, going bicycling, and playing ping-pong. Absolutely anything. Doing three or more workouts a week is good for you. But remember to do some stretches first. 
  #Person1#: Oh, I know. Thank you.