Activity 5.3: Exercising yourself. (Prepositions in, on and at) Complete each sentence with `at', `in' or `on' plus one of the following: 1492 25 December January Monday morning New Year's Eve Sundays 2009 ancient times night the 1950s the moment the same tim 1. The pop star Michael Jackson died in 2009. 2. Christians celebrate Christmas on December 25th. 3. I don't like driving at night because it's very dark. 4. _In ancient times, people believed in many gods. 5. Rock and roll music became popular in the 1950s. 6. I'm really busy at the moment. Can you call me back later? 7. Are you going to see the fireworks display on New Year's Eve? 8. Jack arrived late for work on Monday. 9. In Europe and the United States, most people do not work on weekends. 10. I regularly go skiing in the winter because it snows a lot. 11. Columbus `discovered' America in 1492. 12. If everybody speaks at once, we’ll never understand ea...