1. She is 10 years old.
2. They are classmates.
3. How old is he?
4. He is a new pupil.
5. They are friends.
6. It is a cat.
7. How is she?
8. You are on duty today. 

1    Betty is 10 years old.She  is 10 years old.
2    Ann and Mary are classmates. They are classmates.
3    How old is Max?  How old is he?
4    Mark is a new pupil.He is a new pupil.
5    Julie and I are friends. We are friends.
6    Ginger is a cat. It (he, если это Ваш кот)) is a cat.
7    How is Tina? How is she?
8   You and Bill are on duty today.You are on duty today.