Task 2. Paraphrase the following sentences. Pay attention to the indefinite article before nouns in the singular.

Model: He is my cousin. – He is a cousin of mine.
They are our friends. – They are friends of ours.
1. She is their relative.
2. He is her friend.
3. We are your former students.
4. She is his niece.
5. I am your colleague.
6. They are her children.
7. She is our neighbor.
8. He is her ex-boss.
9. I am his student.
10. It’s her office.