Перефразируйте, употребляя притяжательный падеж. получившиеся словосочетания переведите на язык. : the flat of my sister, the room of these people, the son of her mother, the food of those dogs, the name of this man, the hobby of these gentlemen, the mark of our student, the work of the man, the ball of my child, the friend of susan.

The flat of my sister=my sister's flat

the room of these people = these people's room

the son of her mother=her mother's son

the food of those dogs=those dogs' food

the name of this man = this man's name

the hobby of these gentlemen = these getlemen's hobby 

the mark of our student = our student's mark

the work of the man = the man's work

the ball of my child = my child's ball

the friend of Susan = Susan's friend