27. Would you mind if I went out with your friends at night?

28. An asked me if Ha Long Bay was a wonder of the world.

29. Their house was decorated for a Tet holiday last weekend.

30. It's a fire-making contest.

31. The tourist asked Tam if many people lived at My Son.

32. We were advised to take a bus downtown by them.

xin hay nhất ạ 

27. Do you mind if I go out with my friends at night?

⇒Would you mind if  I go out with my friends at night?

28. "Is Ha Long Bay a wonder of the world?" Ann said

⇒Ann asked"Is Ha Long Bay a wonder of the world?''

29. They decorated their house for the Tet holiday last weekend.

⇒Their house was decorated for the Tet holiday last weekend by They

30/ It is a contest in which participants have to make fire.

⇒It is a fire-making contest

31/ Do many people live at My Son?

⇒ The tourist asked Tam if many people lived at My Son

32/ They advised us to take a bus downtown.

⇒ We were advised to take a bus downtown.

$\text{#Mong câu trả lời hay nhất ạ}$
$\text{#Chúc bạn học tốt nha}$
$\text{@Vân}$