18. What does your mother do?
19. I don't have a computer in my room.
20. Hoa is the tallest of the girls in her class.
21. Minh is shorter than Hoa.
17. when was your birthday?
18.What does your mother do?
19. I don't have a computer in my room.
20.Hoa is taller girls in class.
21.Hoa is shorter than Minh .