The boy who/that helped me lives next door.
The book which/that is lying on the floor is not yours.
The girl who/that is sitting next to you is very clever.
The room which/that faces the street is very noisy.
The women (who/that) we saw at the cinema is Pisti’s wife.
The women you were sitting next to is my sister-in-law.
The woman we talked to yesterday is the boss’s lover.
The book (whic/that) I lent you is Joe’s.
The book I wrote my essay on is very boring.
The book you had been looking for was behind the wardrobe.
This is the woman about whom I’ve already told you.
This is the book about which I told you.
The doctor who wrote this book got a Nobel prize.
Dr. Smit, who wrote this book, got a Nobel prize.
My sister who lives in Canada got married.
My sister, who lives in Canada, got married.