1. Are your ... sisters students? — No, they are ... pupils. 2. My father is ... doctor. He is ... good doctor. 3. He has no ... children. 4. My brother’s ... book is interesting. 5. This is my friend’s ... bag. It is ... brown. 6. She has ... ball. ... ball is big. Her ... ball is green. 7. My mother is not ... teacher. She is ... doctor. 8. There are ... flowers in the vase. ... flowers are beautiful. 9. Do you like ... fruit? 10. She wrote ... letter to her friend. ... letter was long.