These apples belong to the girls. (Эти яблоки принадлежат девочкам.) – These are the girls’ apples. (Это яблоки девочек.)

1. This notebook belongs to Jane.
2. These suitcases belong to our guests.
3. This bedroom belongs to my son.
4. These keys belong to Mark.
5. This painting belongs to Picasso.
6. These poems belong to Pushkin.
7. This helicopter belongs to our boss.
8. These dictionaries belong to the students

требуется притяжательный падеж.№ 2,3,7,8-неправильно

ну тогда сама напиши

1)   It is Jane's laptop2)   These are suitcases of our guests3)   It is the bedroom of my son4)   These are Marko's keys5)   These are Picasso's pictures6)   These are Pushkin's poems 7)    It is the helicopter of our boss8)    These are dictionaries by students