Answer:
1. This is the path that leads to the cave.
2. That is the girl who won the prize.
3. He bought the book that you told him to read.
4. My sister found the ball that was lost.
5. The man is my friend whom you met.
6. We live in this cottage which my grandfather built.
7. I read the book that was given to me by my auntie.
8. There is the farmer whose horse ran off.
Step-by-step explanation: