Задание 3:
1) the boy's car
2) his granny's white cat
3) the children's books
4) the girls' dolls
5) the cows' tails
6) Boris'(s) English teachers
Задание 4:
1) Who does see the child at the door?
2) What is her daughter reading now?
3) Mike usually comes home in the evening
4) The Browns dont have a beautiful garden
5) Jane has a lot of books in her bookcase
6) Please, be on time!
7) Ron's mother always drives to work
Задание 5:
1) her 2) whose 3) it 4) them 5) him 6) your 7) me