OK: It's my jacket., They're my keys., It's Amy's watch., Whose watch is it?, Whose keys are they?, Whose glasses are they?, It's Kevin's water bottle., It's her smartphone., It's Tammi's umbrella., They're his glasses., Not OK: Whose umbrella are they?, Whose keys they are?, Its my umbrella., It's Tammi watch., Whose keys is it?, Whose glasses is it?, Whose glasses they're., Theyre my jacket., Whose smartphone is they?, It's Amy watch.,

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