1. That is a watch.
2. That’s his backpack
4. This is a book.
5. His telephone number is 535-2375.
6. It's his backpack.
7. Dave and Anna are my friends.
8. I am LiLei.
9. My sister likes strawberries.
10. He likes sports.
11. She does her homework in the evening.
12. Mrs. Gao has some new books.
13. I can play soccer.