—______，Tom, are these your books? —No, they aren’t .I think they are_______.

The saying A tree can’t make a forest (森林) tells us that _____ is very important in a football match. 

To my ________ , the square was so clean after the big meeting.

---What are they ?  ---They are            .

 --ls your school far from here? --Not very far. It’s about twenty ____ walk.