Заполните пропуски словами who/which. helen works for a company makes furniture. the book is about a girl runs away from home. what happened to the pictures were on the wall? a mystery is something we don’t understand. the police arrested a man stole my wallet.

Helen works for a company __which__ makes furniture.
The book is about a girl _who__ runs away from home.
What happened to the pictures __which__ were on the wall?
A mystery is something __which__ we don’t understand.
The police arrested a man __who__ stole my wallet.