Choose the correct prepositions

1. If you turn
   [off|up|on|down]
   the music, our neighbours will stop arguing.
2. Every summer a caterpillar turns
   [on|into|over|to]
   a butterfly.
3. Sarah turns
   [back|up|over|to]
   to see what has happened behind her.
4. Jack turned
   [off|to|down|up]
   the job offer to become a writer.
5. My granny is so old. She even can't turn
   [on|into|over|to]
   a TV set.
6. My keys turned
   [off|to|out|up]
   to be in my purse. I have been looking for them since morning.