1 when did david go to barcelona ?

Last year David went to Barcelona for his holiday 

-> thông tin dòng 1 

2 how long did he stay ? 

He stayed there for 5 days. 

-> thông tin dòng 3 

3 how did he go to barcelona ?

He went by air

-> thông tin dòng 2 

4 where did he stay ?

He went by air and stayed in a big hotel in the centre

-> thông tin cuối dòng dòng 2 đầu dòng 3 

5 did he take a lot of photographers

yes he did

-> thông tin dòng : 5 

6 what did he buy ? 

he bought a lot of souvenirs for his friends.

-> thông tin dòng 6

1.  When did David go to Barcelona?

-> David went to Barcelone last year for his holiday 

-> 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 ( dòng 3 ) 

3. How did he go to Barcelona?

-> He went by air ( dòng 2 )

4. Where did he stay?

-> He stayed in a big hotel in the centre ( dòng 2) 

5.  Did he take a lot of photographs?

-> Yes , he did ( took many photographs) 

6.  What did he buy?

->  He bought a lot of souvenirs for his friends ( a lot of souvenirs for his friends.) 

Tất cả đều ở thì QKD vì có từ " Last year " ở ngay đoạn đầu 

+) S+ V ed/ V2

-) S+ didn't + V 

?) Did + S + V 

+ yes + S + did 

-) no + S + didn't