1. There are some birds in the tree. (变为否定句)

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20. -Listen! Who ______________ in the classroom? - Lily is.

19. Everyone ______________ a good time now.

18. Does your mother like ______________ at the mall..

17. Do you want ______________ the animals in the zoo?

16. It's ______________ now. We can't play tennis.

15. I am______________ they can play beach volleyball in this heat.

14. Look! The boys ______________ in the pool.

13. They______________ the classroom after school every day.

12.　 Many people ______________on the beach now.