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1)I am going to buy … (some/any/something) olive oil for the salad.
2) Sorry. We don’t have … (some/any/no) free time now.
3)Is there … (somebody/anybody/everybody) in the house?
4)… (somebody/everybody/nobody) knows that two plus two is four.
5)It’s very cold here, so … (somebody/anybody/nobody) wants an ice-cream.