Choose the right prepositions ( in, at, on ) 1. i usually finish my work 5p.m. 2. the party'ii be monday. 3. my father works night. 4. please, call me __ nine o'clock. 5. summer we often go to the beach.

1. I usually finish my work at 5 p.m.
2. The party'II be on Monday.
3. My father works at night.
4. Please, call me at  nine o'clock.
5. In summer we often go to the beach.