1. The ball of the dog.=The dog's ball.2. The skateboard of that man.=That man's skateboard.3. The songs of the children.=The children's songs.4. The umbrella of my grandmother.=My grandmother's umbrella.5. The room of my brother.=My brother's room.6. The questions of my son.=My son's question.7. The wife of my friend.=My friend's wife.8. The table of our teacher. =Our teacher's table.9. The poems of Pushkin.=Pushkin's poems. 10. The voice of this girl.=This girl's voice.11. The new club of the workers.=The workers' new club.12. The letter of Pete. =Pete's letter.13. The car of my parents.=My parents' car. 14. The life of this woman.=This woman's life. 15. The handbags of these women.=These women's handbags.16. The flat of my sister is large.=My sister's flat is large.17. The children of my brother are at home.=My brother's children are at home.18. The room of the boys is large.=The boys' room is large.19. The name of this girl is Jane.=This girl's name is Jane.20. The work of these students is interesting.=These students' work is interesting.21. The computer of my son is modern.=My son's computer is modern.22. He was a friend of my cousin.=He was my cousin's friend.