Ответ:
1) Many people walk, but few have something to say.
2) You need a few potatoes to make some pancakes.
3) A little porridge is enough for my breakfast.
4) This lemon drink is sour. Put a few lumps of sugar in it.
Правило: few / a few употребляются с исчисляемыми существительными во множественном числе, а little / a little — с неисчисляемыми существительными.
