Prepositions of Time I

Choose the correct prepositions.

1. in at on the afternoon
2. in at on Monday
3. in at on 6:30 am
4. in at on January
5. in at on 1971
6. in at on the evening
7. in at on night
8. in at on the 17^th century
9. in at on Easter
10. in at on spring
11. in at on the Independence Day
12. in at on Sunday morning
13. in at on the past
14. in at on the twenties
15. in at on the 16^th September