помогите плиз , срочно надо .

B)
11. They saw him yesterday.
12. He went to the zoo yesterday.
13. They had five lessons yesterday.
14. They flew.
15. They said goodbye.
C)
16. Did he clean the room yesterday?
17. Did she wash her bike yesterday?
18. Did they skate yesterday?
19. Did she help her mother yesterday?
20. Did they watch TV yesterday?