=>
1. When did David go to Barcelona?
-> Last year David went to Barcelona for his holiday.
2. How long did he stay in the city centre?
-> He stayed there for 5 days.
3. How did he go to Barcelona?
-> He went by air.
4. Where did he stay?
-> He stayed in a big hotel in the city centre.
5. Did he take a lot of photographs?
-> Yes, he did.
6. What did he buy?
-> He bought a lot of souvenirs for his friends.