Bài 3:
1. That
2. This
3. That
4. Those
5. These/that
6. These
7. That
8. That
9. That
10. This
11. Those
12. This
13. Is
14. These
15. Them
16. Those
17. That
18. This
19. Those
20. It
1. This is my book that is your book
2. Music is my favourite subject
3. I want to be a teacher and my sister wants to be a doctor
4. Mai likes English but her brother doesn't
5. Nam and Lan's teacher is very nice and friendly
6. Hoa's pencil case is blue. Her friends' pencil case are violet
7. Those student's school bags are