Ответ:

1. isn't it

2.can't you

3. has not she

4.aren't they

5.couldn't they

6.can they

7.shouldn't he

8.isn't it

9.wasn't he

10.didn't he

11.did she

12.was she

13.weren't they

14.didn't they

15.does he

16.doesn't he

17.didn't he

18.aren't i

19.do you

20.can you