Relative clause

I. Theory.
Which, who, whom, whose, when, that and where are ''relative pronouns'' when they are used not only as pronouns but also as conjunctions to join 2 sentences or clauses.
Eg: My friend is Marie. She is a girl I want to introduce to you.
---> My friend is Marie who is a girl I want to introduce to you.
In this sentence ''who'' replace ''she'' , '' who '' also refers to Marie.

II. Exercise.
1. Here are the papers that you were looking for.
2. I like travel every place that has own natural beauty.
3.The table at the corner of my house, which my father used over 10 years ago, needs to be changed.
4. I will never forget the day when I first went to work.
5. Do you remember the address of the book shop where we bought some books last week?
6. He has married somebody whom I really do not like.