Ответ:

1. Was, wasn't

2. Was, Went

Came, saw, Was playing

4.was, decided

5.had, were having

6.saw, didnt recognize

7. Did prepare

Was, was preparing

1. Why were you angry with me yesterday? - I wasn't.

2. Where were you... - We were.

3. came\saw\was playing

4. was\decided

5. What time did they have supper? - They were having...

6.saw\didn`t recognize

7. Did you prepare...?

8. liked\saw

9. was\was preparing