Preposições: um exercício sobre IN - ON - AT

Well guys, como eu disse, não me esqueci do Inglês! Aqui está um pequeno exercício sobre três preposições que confundem muito: IN - ON - AT. Façam o quizz e boa sorte!

1. It gets very cold ____ winter.
Answerin
2. Betty doesn't have a job ____ the moment.
Answerat
3.The telephone and the doorbell rang ____ the same time.
Answerat
4. He flew from Japan. He's probably ____ Perth now.
Answerin
5. Would you like to go out to dinner ____ Friday night?
Answeron
6. She was tired. She's ___ bed now.
Answerin
7. Goodbye! I'll see you ____ the morning.
Answerin
8. Were you ____ Tom's party last night?
Answerat
9. I'll see you ____ two weeks time.
Answerin
10. She was born ____ 1961.
Answerin
11. The doctor will see you ____ 10:00am.
Answerat
12. ____ the age of ten I wanted to be a firefighter.
Answerat
13. My wife gave me a wonderful present ____ my birthday.
Answeron
14. The coffee is ____ the shelf.
Answeron
15. My pen is ____ my pencil case.
Answerin
16. He's gone to work. He's probably ____ work now.
Answerat
17. He lives ____ Australia.
Answerin
18. ____ my opinion you should buy the blue shirt.
Answerin
19. ____ second thought, the green shirt is nicer.
Answeron
20. I'll see you ____ Monday.
Answeron
21. I'll be taking my holiday ____ Christmas this year.
Answerat
22. Buy some bread and milk ____ your way home.
Answeron
23. What will you be doing ____ New Year's Eve?
Answeron
24. ____ the end of a course students usually have a party.
Answerat
25. The flowers ____ your garden are very beautiful.
Answerin
26. There were many cars ____ the road today.
Answeron
27. Tom and Betty always go out to dinner ____ their wedding aniversary.
Answeron
28. We got up ____ dawn today.
Answerat
29. Are you doing anything ____ the weekend?
Answeron
30. We live ____ this address.
Answerat