| 选用is或are填空。 | |
| 1. This ______ a book. 3. It ______ a nice dog. 5. She ______ a girl. 7. You ______ a good boy. |
2. That ______ a clever rabbit. 4. He ______ a doctor. 6. We ______ friends. 8. The teachers ______ in the classroom. |