1. The children are playing the playground. (in/on/at)

2. We met a conference last year. (in/on/at)

3. We usually go on holiday ….. ……. July.

4. My mother sometimes goes shopping Saturday morning.

5. They always travel weekends.

6. We have a meeting scheduled 10 a.m.

7. Flowers bloom the spring.

8. We eat lunch noon.

9. His birthday is July 4th.

10. The train leaves midnight.