употребите притяжательный падеж вместо словосочетания с предлогом of
1. the brother of this boy
2. the parents of John
употребите во множественном числе :
a calony, a sister, a wolf, a wall, an eye, a states man, a schoolchild, a mouse, a woman, a box, a house, a toorh, a story

1. This boy's brother2. John's parents. ______________________________calonies, journeys, sisters, wolves, walls, eyes, states-men, schoolchildren, mice, women, boxes, houses, teeth, stories.