1)Who (by profession) is your father?2)Those who know English, can read English books3)Why did you come sooner?4)Who did you meet today?5)When you go to work?6)Anyone who likes to read books, take them to the library7)Whose is this letter? - This is our letter8)Who is this man? - This person is our teacher9)What is a book? - It's good books10)
Which of these books is ours? - They're all ours.