Используя притяжательный падеж: пример: children/john – john’s children the best time/ year – the best time of year 10. the questions/ my son 11. the poems/ lermontov 12. the room/ my sister 13. the end/ the street 14. the colour/ wall 15. the help/ your friend 16. the book/ this girl 17. birthday/ his mother 18. the pupils/ my class 19. job/ gladys 20. books/ the boys 21. toys/ the child 22. the house/ my family 23. the copybook/ the student 24. the plate/ the cat

10. / my son's questions
11. / Lermontov's poems
12.  my sister's room
13. the end of the street
14. the colour of the wall
15. / your friend's help
16. / this girl's book
17. / his mother's birthday
18. the pupils from (of) my class
19. / Gladys' job или Gladys's job - можно использовать оба варианта использования формы притяжательного падежа в данном случае
20. / the boys' books
21./ the child's  toys
22. the house of my family
23. / the student's copybook
24. / the cat's plate

10. My son's questions
11. Lermontov's poems
12. The room of my sister
13. The end of the street
14. The colour of the wall
15. Your friend's help
16. The book of this girl
17. His mother's birthday
18. The pupils of my class
19. The job of Gladys
20. Books of the boys
21. Child's toys
22. The house of my family.
23. The student's copybook
24. Cat's plate.