用所给词的适当形式填空。

1. Ms Ba sometimes watches her students having fun _____ (play) on the playground.

2. Go _____ (cross) the bridge, you can see a tall tree with many flowers on it .

3. Children often enjoy _____ (they) at school .

4. Sheep like to eat grass and _____ (leaf).

5. Please _____ (be) quiet when you are with pandas in the zoo.

6. We sometimes listen to some _____ (relax) music when we're tired.

7. Hunan Street is a good place _____ (have) fun..

8. I like elephants because they are so _____ (beauty).

9. Are _____ (thief) afraid of the police? Yes, very much.

10. Do you think koalas are very _____ (friend) to people?