Срочно помогите! Очень нужно пожалуйста. Заранее спасибо!

1. what are you doing tonight?2. how often do they visit their parents?3. I'm waiting for you for 2 hours.4. He has been slipping since ..........5. I've never been to Australia.6. Peter was cooking when the phone rang.7. Betty had been writing since 9 o'clock. She has written seven reports up to know.8. took, left,drove9. What were you doing when we called you yesterday?10. you have ever given 11. I didn't go to school yesterday12. had already cooked dinner