1 Who is studying in the living room?
2 How long did the show last?
3 Where does your family usually go on summer vacation?
1. My brother is studying in the living room.
\(\Rightarrow\) Who is studying in the living room ?
2. The show lasted for three hours.
\(\Rightarrow\) How long did the show last ?
3. My family usually goes to Nha Trang on summer vacation.
\(\Rightarrow\) Where does your family usually go on summer vacation ?