Preposition: at, in, or on.

Complete the following sentences with the correct preposition: at, in, or on.
1. Will you wait for me ____at_ the bus stop?
2. Jane is ____in_ her bedroom.
3. Daria's books are lying _on____ the floor.
4. The girls didn't want to spend a long time _at____ the carnival.
5. I let the cat sit __on___ my lap, but then suddenly it jumped __at___ my face!
6. Do you live __in___ the city or __at___ the country?
7. Trent arrived _in____ the school building just in time.
8. The rancher built a fence to keep his cows _on____ the pasture.
9. Kevin and Mack are out practicing _in____ the football field.
10. From afar, Heathcliff could see a light _on____ the window.
11. The old house had so much grime _on____ the windows that Bradley could hardly see inside.
12. The shepherd boy grazed his flock __at___ the grassy hillside.
13. The audience threw tomatoes _at____ the terrible comedian.
14. Wrestling isn't real; those guys __in___ the ring are just pretending.
15. David works __in___ the field of network administration, while Marty works __in___ web design.
16. The car stalled and got stuck _in____ the street.
17. Audrey lives _on____ Third Street.
18. If William doesn't make any money on his book, he'll be out __on___ the street.
19. I'll use my cellular phone when I'm __on___ the bus, but never while I'm __in___ the car.
20. Passengers are not allowed to use electronic devices _on____ airplanes during takeoff and landing.