1.Brenda is a friend whom I went on holiday with.

2.This is Mr.Smith whose son Bill plays in our team.

3.Her book which was published last year became a best seller.

4.This is the bank from which we borrowed the money.

5.The girl whom I told you about is at the door

6. Jack, whose car had broken down, had to take a bus. 

7.I lent you a book which was written by one my friends.

8.Some boys who have been released were arrested.

9.Do you now a restaurant where we can have a good meal.

10.I don't remember the day that i left school on.

11.This is the man whom i met in Paris.

12.I wanted the painting which you bought.

13.This is the chair which my parnets gave to me.

14.She's the woman who telephoned the police.

15.He's the person who wanted to buy your house.

=>
1. Brenda, whom I went on holiday with, is a friend.
2. This is Mr.Smith, whose son Bill plays in our team.
3. Her book, which was published last year , became a best seller.
4. This is the bank from which we borrowed the money.
5. I told you about a person who is at the door.
6. Jack whose car had broken down had to take a bus.
7. I lent you the book which was written by one of my friends.
8. Some boys who were arrested have been released.
9. Do you know a restaurant where we can have a good meal?
10. I don't remember the day when I left school.
11. This is the man whom I met in Paris.
12. I wanted the painitng which you bought.

14. She's the woman who telephoned the police.
15. He's the person who wanted to buy your house.