12 Example key:
1 Ella’s teacher, who looks a lot like your dad, was at the concert too.
2 That's the song that/which I heard on the radio this morning.
3 What's the name of the actor whose car was stolen?
4 I can't remember the name of the person to whom I gave my book.
5 Can you show me the house in which you used to live?
6 How old is the boy that/who lives down the street?
7 Emma told me a story that/which I didn't believe.
8 Do you know the girl whose parents work for Google?