Английский 9 класс помогите пж

Past Simple Questions - Exercise

1. Who did you meet?
2. What time did he arrive?
3. Who did you see yesterday?
4. What did they want?
5. What time did it end?
6. Why did he go home early?
7. What did we have for dinner?
8. How much did it cost?
9. What did he buy?
10. What did we eat?

How much did it cost? What did he buy? What did we eat?

8 did it cost? 9 did he buy? 10did we eat?