1. Did you go to school?
Yes,i did
2. Did you study yesterday?
Yes,i did
3. Did you travel to Africa last year?
No,i didn't
4. Did you sail last week?
Yes,i did
5. Did they go to the cinema yesterday?
Yes,they did
6. Did she go to the theatre yesterday?
No,she didn't
7. Did he buy a new car last year?
Yes,he did