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Look at the 's in these sentences. Write a letter in the box:A = possessive, B = is.1 Kate's sister is a lawyer.A 5 Their uncle's a pilot.2 His mother's very short.B 6 Jim's children wear glasses.3 My cousin's flat is very big. 7 My brother's wife plays the piano.4 Our grandfather's 70 today. 8 Her name's Christina.with whose or who's