1. He thought he had met her before;
2. The economist had worked in our department for 10 years.
3. The head of the department recieved the latest catalogues last week.
4. That contact that you had signed was profitable for our company.
5. My friend thanked me for what I had done.
It is not a tree.
It is not a flower.
It is not a doll.
It is not a ball.
It is not a toy.
It is not a boy.