Choose the correct preposition. 1 A burger consists of/in beef between two slices of
bread.
2 They served the steak at/with vegetables.
3 I can't decide at/on what to have for dessert.
4 He decided to participate for/in the cooking
competition
5 Milk is rich with/in calcium.
1. Of
2. With
3.on
4. In
5 in