Ответ:

  1. How many books are there on the shelf?
  2. How many trees are there in the garden?
  3. There isn’t much sugar in the cup.
  4. We don’t have much homework.
  5. How much money have you got?
  6. There aren’t many apples in the basket.
  7. There isn’t much water in the bottle.

Many употребляется с исчисляемыми существительными во множественном числе, much — с неисчисляемыми.