Choose the correct preposition

1. Shhh! I'm trying to listen
   [at|to] the radio!
2. I'm not very keen
   [on|at] modern technology. A lot of it is too confusing for me.
3. I was so bored
   [with|on] the journey. I wish I'd had my MP3 player.
4. Is that the digital camera that you won
   [in|on] the competition?
5. He's hooked
   [with|on] computer games. He stays up all night playing them.
6. Sarah is doing research
   [of|on] computer technology at university.
7. Jane has a very important job with a computer company and is always
   [on|from] the move.