1. The tower which is very high, was built a long time ago.
2. The student who is speaking in front of the crowd, comes from Japan.
3. I will take you to see the man, who is a heart specialist.
4. The police wanted the man who was a member of the underworld all over the world.
5. We found the house which was empty when we were walking in the forest.
6. The company where my mother works, makes domestic products.
7. May Day is a day when people don't work.
8. The beach where people used to go on holiday, was destroyed by a violent storm.
9. The day when he left, was rainy.
10. The woman whose husband had gone out with some friends, was very miserable.
11. Do you know the man whose daughter you talked to last night?
12. The computer that you're using, has a powerful configuration.
13. The student who sits next to me, is from China.
14. I thank the woman who had helped me.
15. The doctor who works in the local hospital, is very famous.
GOOD LUCK!!!!!!!!