Ответ:

1/ had done, was playing/

2/ was,   arrived, had gone.  

3/ had come, had.

4. looked, had worked.

5.had learnt, was watching.

6. saw, was reading, had bought.

7. had gone, phoned.

8. entered, saw, was playing, had bought.

9. arrived, had begun,.

10. came, was playing, had bought.

11. Wanted, had not met.

12. told, had planned.

13. was, had had.

14. arrived, went / had gone.

15. brought, had asked.

16.entered, saw, was eating.

17. told, had watered.

18. wanted, had chosen.

19. was, had not told.

20. knew had started.

Объяснение: