用am,is,are填空。
1. Excuse me! ________ this your eraser?
2. What ________ those?
3. This ________ his ruler.
4. I ________ Mary. Are you Anna?
5. ________ these her English books?
6. Those ________ her pencils.
7. She ________ my sister.
8. He ________ my friend.
9. ________ those maps? No, they aren't. They are pictures.
10. These are your dictionaries. Here you ________.
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