Ответ:

1. will leave/ is going to leave

2. am. are waiting

3. were. Do you like the opera? am enjoying

4.are you going to go to London...?

5. know, will have, will live

6. didn't know

7. is worrying, don't

8. was, had

9.am I going

10. were

11.are

12. does, is, don't know

13. are you going, I am going to go,

14. Do you know, took

15. went

16. was, enjoyed(хотя я бы поставила was enjoyed)

17. won

18.is, is playing

19. am, missed, know, is

(поправьте если что-то не так)