Choose the right preposition:

1. He left his keys ... the door lock.

2. I met him ... the bus stop.

3. The remote control is ... the table.

4. There is a good movie ... television tonight.

5. I need to study ... home.

6. His mother is very ill and is ... bed.

7. He said he'd meet me ... 8 o'clock.

8. I'm cold so I am going to put ... a sweater.

9. David is ... the dentist's.

10. These oranges are cheap because they are ... sale.