33.Who is studying in the living room?

34.Who is your favourite singer?
35. How long did the show last?
36.Where do your family usually go for summer vacation?

33. My brother is studying in the living room.

=>  Who is studying in the living room ?

35. The show lasted for three hours.

=>  How long did the show last ? 

36. My family usually goes to Nha Trang on summer vacation.

=>  Where does your family usually go on summer vacation ?