---I think ______ people drive, ______ air pollution there will be.---That’s true. I hope the air will be fresher soon.
---Did you go to school yesterday? --- Yes, I did. But I was late. When I got to school, Mr. Zhang __________his lessons.
--- May I go now? --- No. You ______________ let the teacher know first.”
--What do you think of the EXPO 2010? --- It’s great, of course. people are going to Shanghai for the EXPO 2010.
---Do you know Lisa’s address? ---No, she didn't tell me ________________.
---You are quite different from your sister. ---Yes. We are both short. But my eyes are ________ than ________.