напиаать краткую форму пиитяжательного патежа (father's pen the pen of the father): 1) the flat of the sister; 2) the bike of my brother: 3) the balls of the boys; 4) the books of the students; 5) the toys of the children.
Ответ
Автор - tanyagalka
1)sister’s flat 2) brother’s bike 3) the boys’ balls4) students’ books 5) children’s toys