Ответ:

1. was

2.was

3.worked\was work

4. wasn't

5.was

6. wasn't

7.was

8.was

9.were

10. was

11.were

12. wasn't

13.was

14.was

15.was

16.wasn't

17.was

18.wasn't

19. was

20.was

Объяснение:

Я так думаю