a) the, b) a, c) -
1) It was a hot day.
2)I don’t like the coffee, but I like tea.
3)I would like to travel to the Spain.
4)Paul was the only person who remembered me.
5)...Breakfast is the most important meal of the day.
6)On...Sunday we have no trainings.
7)Catherine loves...cats.
8)...Dniper is a very important waterway.
9)This is... very famous actor.

1. It was a hot day. 2. I don’t like coffee, but I like tea.3. I would like to travel to Spain.4. Paul was the only person who remembered me. 5. Breakfast is the most important meal of the day.6. On Sunday we have no trainings.7. Catherine loves cats.8. The Dniper is a very important waterway.9. This is a very famous actor.