1. He was the first man who left the burning building.
2. The last person who leaves the room must turn out the lights
3. The child is lonely; he would be happier if he had someone that he could play with.
4. Here are some accounts that you must check.
5. My brother is the only one who realized the danger
6. The Queen Elizabeth is the largest ship which has been built on the Clyde.
7. We had a river in which we could swim
8. She said that she wasn't going to buy any cards; she hadn't anyone to whom she could send cards
9. Neil Armstrong was the first man who walked on the moon.