1. gave, hadn't read

2. had enjoyed

3. hadn't phoned

4. came, had left

5. returned, saw, had broken

6. had left, arrived

7. had made, got

8. had studied, did

9. forgot, hadn't done

10. was, had worked

11. came, had taken

12. parked, had drunk

13. was, hadn't had

14. had seen

15. had escaped, arrived

16. arrested, had stolen

17. showed, had committed

18. checked, had locked

19. opened, had eaten

20. met, had finished