Do you go to school on foot ?
---I think ______ people drive, ______ air pollution there will be.---That’s true. I hope the air will be fresher soon.
----_______ wonderful girl she is ! She can skate so well.---- ____ more and make it better .
---The news he will come back made us _______.---Come on. We must finish the work and don’t _______.
The book is well worth ______. Everyone ______ buy one and read it.
You have grown up and you should _______ what you have done .