Ответ:

II. Countable/Uncountable Nouns:

  1. Would you like to taste some cake? (Cake can be countable or uncountable. 'Some' is used in offers and requests with uncountable nouns and plural countable nouns.)
  2. There is much food in the fridge. (Food is an uncountable noun. 'Much' is used with uncountable nouns in affirmative sentences.)
  3. We haven't got much time. (Time is an uncountable noun. 'Much' is used with uncountable nouns in negative sentences.)
  4. There are many sweets in the box. (Sweets are countable. 'Many' is used with countable nouns in affirmative sentences.)
  5. I don't eat any fruit for breakfast. (Fruit can be uncountable or countable when referring to types of fruit. In this context, 'any' is used in a negative sentence.)