Ответ:
1.They danced at the concert two days ago.
- They didn't dance at the concert two days ago.
?Did they dance at the concert two days ago?
2.My friends walked in the park yesterday.
- My friends didn't walk in the park yesterday
? Did my friends walk in the park yesterday?
3.The children talked in the classroom.
-The children didn't talk in the classroom
? did the children talk in the classroom?
4.We enjoyed our meal in the café.
- we didn't enjoy our meal in the cafe
? Did we enjoy our meal in the cafe
5.My parents stayed at home on a rainy day.
- my parents didn't stay at home on a rainy day
? Did my parents stay at home on a rainy day?