This is the house. Jack built it.
This is the house which/that Jack built.
Where is the book ________ Paul lent you?
Where is the book that/which Paul lent you?
Bring me the file. The file is on the table.
Bring me the file which/that is on the table.
She saw the boy __________ lives next door.
She saw the boy who/that lives next door.
She worked for a man. The man used to be an athlete.
She worked for a man who/that used to be an athlete.
Here's the computer program ______ I told you about.
Here's the computer program that I told you about.
A monk is a man. The man has devoted his life to God.
A monk is a man who/that has devoted his life to God.
Is this the person _______ you asked me about?
Is this the person who you asked me about?
A ferry is a ship. It carries people across the water.
A ferry is a ship which/that carries people across the water.
I work in a company _________ sells things on the Internet.
I work in a company which/that sells things on the Internet.
Once upon a time there lived a giant. The giant was very powerful and cruel.
Once upon a time there lived a giant who/that was very powerful and cruel.
I don't believe the story _______ she told us.
I don't believe the story that she told us.
That is the place. I grew up there.
That is the place where I grew up.
The summer _____ I graduated from university was long and hot.
The summer when I graduated from university was long and hot.
Mr. Hannigan is a successful businessman. He owns half of Manhattan's skyline.
Mr. Hannigan, who owns half of Manhattan's skyline, is a successful businessman.
This is the time of the year _____ many people suffer from hayfever.
This is the time of the year when many people suffer from hayfever.
A boy answered the phone. He told me you were at school.
The boy who/that answered the phone told me you were at school.
This is the gun with ________ the murder was committed.
This is the gun with which the murder was committed.
The site is really interesting. John sent me to the site.
The site where John sent me is really interesting.
The meal, ______ wasn't very tasty, was quite expensive.
The meal, which/that wasn't very tasty, was quite expensive.