The girl is wearing a striped dress. She is my friend.
The girl WHO/THAT is wearing a striped dress is my friend.
There is a café near my house. You can eat cupcakes in that café.
There is a café near my house WHERE you can eat cupcakes.
You were next to a boy the other day. Who was he?
Who was the boy WHO/THAT was next to you the other day?
I study in a school. It is in the city centre.
The school WHERE I study is in the city centre.
I bought a mobile phone last week. It's not working.
The mobile phone THAT/WHICH I bought last week isn't working.
We were listening to a song yesterday. What's the name of the song?
What's the name of the song THAT/WHICH we were listening to yesterday?
We played a game last night. It was really fun.
The game THAT/WHICH we played last night was really fun.