làm tiếp đi :)

1.     There aren't many students in my class.
much → many

2.     My new school is bigger than my old one.
more bigger → bigger

3.     Nam lives on Tran Hung Dao street.
at → on

4.     Why is Hoa unhappy? – Because she misses her parents and friends.
How → Why

5.     Her date of birth is on May twelfth.
twelve May → May twelfth

6.     Hoa doesn’t have any friends in Hanoi.
some → any

7.     We can get our books at recess.
in → at

8.     It takes me a day to paint this house.
painting → to paint

9.     I am never late for school.
at → for

10. It’s difficult to train dogs.
training → to train