4.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.
His parents' house, the women's rights, my sisters' children, my grandparents' car, her brothers' room
my sister Mary's children
my friend's letter
this writer's stories
my brother's younger daughter
his parents' house
the women's rights
my sisters' children
my grandparents' car
her brothers' room