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 ________. |