Краткое пояснение: В английском языке 'a' используется перед исчисляемыми существительными в единственном числе, 'some' - перед неисчисляемыми и множественными.
- Could I have a sandwich, please?
- Could I have some cheese, please?
- Could I have some cheese sandwiches, please?
- Can you buy some cakes?
- Will you make some sandwiches, please?
- There is a fridge in the kitchen.
- There is a sandwich in the fridge.
- There are some sandwiches in the fridge.
- There is some butter in the bowl.
Ответ: смотри решение