Examples of Relative Clause

1. I'm looking for a secretary who can use a computer well.
2. She has a son who is a doctor.
3. We bought a house which / that is 200 years old.
4. I sent a letter which / that arrived three weeks later
5. The people who live on the island are very friendly.
6. The man who phoned is my brother.
7. The camera which / that costs £100 is over there.
8. The house which / that belongs to Julie is in London.