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1.There are (a few/ a little) people who do not know about it.
2.There is (a little/little) butter on the butter dish, we can make a sandwich.
3.Is there any milk in the jug? – Yes, there is (little/a little).
4.This rule is very difficult, (few,/a few) people can understand it.
5.Hurry up! We have (little/ a little) time before the train starts.