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esercizio 10 - capitolo unit 6 - save the earth

keith should brainstorm with the community for ideas to keep his town tidy.
jane shouldn't eat anything heavy if she's not feeling well.
we shouldn't have stayed out late at the concert knowing we had an important test the next morning.
john shouldn't have approached the strange man and should have called the authorities instead.
mae should consider carpooling or using public transportation to commute green, even if she lives far away.