2.
- My sister didn't listen to music yesterday.
? Did your sister listen to music yesterday?
3.
- Anna didn't make a cake last Friday.
? Did Anna make a cake last Friday?
4.
- They didn't write a letter to him last night.
? Did they write a letter to him last night?
5.
- I didn't sing a song at Lan's birthday party.
? Did you sing a song at Lan's birthday party?
6.
-He wasn't at his grandparents' house yesterday.
? Was he at his grandparents' house yesterday?