用am, is, are填空  

1. Excuse me! ________ this your eraser?   

2. What ________ those? ________ they birds?   

3. This ________ his ruler. Where ________ my ruler?

4. I ________ in Class Three. ________ you in Class Three, too?

5. ________ these her English books?

6. Those ________ their apples. Where ________ his apples?

7. She ________ eleven. How old ________ that boy?

8. He ________ my friend. ________ your friend a boy or a girl?

9. ________ those maps? No, they ________ not. They ________ pictures.

10. These ________ your bananas. Here you ________.