Замените существительные с предлогом "of существительными в притяжательном падеже: - the flat of my mother, the children of my sister Mary, the letter of my friend, the stories of this writer, the younger daughter of my brother; - the house of his parents, the rights of the women, the children of my sisters, the car of my grandparents, the room of her brothers.

1) the flat of my mother - my mother's flat, 2) the children of my sister Mary - my sister Mary's children, 3) the letter of my friend - my friend's letter, 4) the stories of this writer - this writer's stories, 5) the younger daughter of my brother - my brother's younger daughter, 6) the house of his parents - his parents' house, 7) the rights of the women - the women's rights, 8) the children of my sisters - my sisters' children, 9) the car of my grandparents - my grandparents' car, 10) the room of her brothers - her brothers' room.