Miss White comes into the classroom. She sees some school things on the teacher's desk. There is a pencil box, a red pencil, two black (pen) and orange notebook. Whose are they?
Miss White asks Tina, "Tina, is this (you) pencil box?" Tina says，"Yes, it is. Thank you." "Are(this) your pens?" asks Miss White. "No, they . They're (Mary)," says Tina.
Miss White goes to Mary and says, "Are these your pens, Mary?" Mary says, "Yes, are. Thank you." "What the red pencil? Is it (you), too?" Miss White asks. "No, it isn't," says Mary, "I think it is Bob's, please ask(he) ."
