Fill in "since" or "for"
1. .......................... ages
2. .......................... three years ago
3. .......................... I had a holiday
4. .......................... February
5. .......................... two days
6. .......................... ten o'clock
7. .......................... a year
8. .......................... I got up this morning
9. .......................... ten hours
10. .......................... Christmas
11. .......................... a long time
12. .......................... March
13. .......................... yesterday
14. .......................... I was ten
15. .......................... an hour
16. .......................... two days ago
17. .......................... May
18. .......................... Monday
19. .......................... a day
20. .......................... 15 minutes