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?
