1"How ...rice is there?""Not...." 2."How ...potatoes are there?""Not...." 3."How ...biscuis are there?""Not...." 4."How ...milk is there?""Not...." "How ...apples are there?""Not...."\

Much употребляется с неисчисляемыми существительными, а many - с исчисляемыми. 1. How much rice is there? - Not much. 2. How many potatoes are there? - Not many. 3. How many biscuits are there? - Not many. 4. How much milk is there? - Not much. 5. How many apples are there? - Not many.