1. Mary would rather buy presents in the shop than buy/buying them in the airport.
2. I prefer to discuss my problems with my parents rather than speak about them with my teachers.
3. John prefers take/taking photography to paint/painting.
4. Susan would rather make/making costumes for the school theatre than play/playing a role in it.
5. Children prefer to eat junk food rather than have home-made dishes.
6. Teachers prefer giving tests to having a party.
7. Wild animals prefer to live in the forests rather than be in the zoo.