1. It is my friend's family. My friend's father is an engineer. My friend's mother is a teacher.
2. She took her brother's books.
3. Give me your students' exercise books.
4. Is it your teacher's book?
5. Whose bag is this? — It is Peter's bag.
6. Whose dictionaries are those? — Those are students' dictionaries.
7.Take the children's toys.