6. I .............. ( sleep , not ) wellbecause
the bed ........... ( be , not )comfortable
7. She ............... ( leave ) early because she had some work to do .
8. My father .............. ( teach ) me how to drive .
9. John ........... ( take ) a picture of his friend while he ( not , look ) .
10. What ...... ..... ( you , do ) when the accident happened .
11. When ..... ....... ( I , be ) a child , I wanted to be a dentist .
12. What ..... ( you , do ) at midday yesterday
