A dentist is a person ________ pulls your tooth out.
who
The man fell down. He was riding the bike.
The man who fell down was riding the bike.
This is the chair. My parents gave it to me.
This is the chair that my parents gave to me.
A student is someone ______ studies hard for the exam
who
We threw out the computer. It never worked properly.
We threw out the computer which/that never worked properly.
This is the woman. She gave me my first job.
This is the woman who gave me my first job.
I don’t like stories ________ have unhappy endings
which/ that
She's the woman. She telephoned the police.
She's the woman who telephoned the police.
We're looking for all the balls. We were playing with them.
We're looking for all the balls that we were playing with.
A chair is something _______we sit on.
which/that
Every meal was delicious. Ben cooked it.
Every meal that Ben cooked was delicious.
That's the woman. I was telling you about her.
That's the woman who I was telling you about.
This is the best movie ________ I have seen recently.
that
I gave you some flowers. I bought them from APITA store.
I gave you some flowers which I bought from APITA store.
Tom took some pictures. They are beautiful.
Tom took some pictures which are beautiful.