10 years ago， _________ only one classroom building in our school. And in 10 years， _________ five classroom buildings in our school.

The windows are broken and need to be repaired.— I think so. They can hardly _____ the cold now.

It is useless book to children. Put it into left drawer and never read it.

Are you going to see the film tomorrow?－I have no idea. If you don’t, ______.

Will you stay at home until your sister comes back? —Sorry, I _______. I have a meeting and have to go in ten minutes.