Помогите плиз плиз прошу умоляю

как-то подозрительно легко ,чую подвох, но вроде так:
1. returned
2. had returned
3. finished
4. had finished
5. thought / had lost
6. told / had seen
7. came / had cooked
8. returned / had done
9. entered / had opened
10. gave / had bought
11. showed / had drawn
12. gave / had brought
13. saw / hadn't washed
14. understood / hadn't done
15. knew / hadn't yet come
16. woke up / had already gone
17. thought / hadn't yet come
18. told / had cooked
19. found / had lost
20. came / had left