1. It's a book which/ that will interest children of all age.
2. The people who/that live next door keep having all night parties.
3. Theese are the keys which/ that open the front doors and the back door.
4. Here an article which/ that might interest you.
5. Where the eggs which/ that are in the fridge?
6. Have you got something that will get ink out of the carpet?
7. Where is the girl who/ that sells the ticket.
8. Half of the people who/ that were invited didn't appear.
9. The festival which/ that is called Easter is in late March or early April .