1. This is Tony's watch. (Tony); 2. This is my uncle's house. (uncle); 3. These are the girls' flowers. (girls); 4. The men's cars are parked there. (men); 5. There are women's dresses in this shop. (women); 6. All students' classes are canceled. (students); 7. My dad's sister is my aunt. (dad); 8. Cathy's work is the best. (Cathy); 9. My grandfather's room is upstairs. (grandfather); 10. That cat's eyes are green. (cat).