I am Bill.I am an English teacher.My wife  is Linda.She is a nurse. We have a daughter and a son. Look! These are my friends.This is Mr Black.He's a worker.He works in a shoe factory .He makes shoes.That's Mrs Black.She works in a supermarket .The girl is their daughter.She's a student.She's thirteen.The boy is their son.He is only seven years old.His name is Carl. We are good friends. Who is Carl?
He's Bill's son. He's Linda's son. He's a worker. He's Mrs Black's son.