Ответ:

Правило: much употребляется с неисчисляемыми существительными, а many — с исчисляемыми существительными во множественном числе.

  1. How much money do you have in your wallet?
  2. There aren't many chairs in this room.
  3. How many apples do we need for the pie?
  4. He doesn't drink much coffee in the evening.
  5. Are there many parks in your city?

Ответ: 1) much; 2) many; 3) many; 4) much; 5) many.