Mike sees some things on the desk. They are a dictionary, a watch, a pencil, a pen and a ruler. Whose(谁的) are they?
Mike asks Tina, "Excuse me, Tina. Is this your pencil?"
Tina says, "Yes, it is. Thank you."
"Is this yellow ruler yours, too?" asks Mike.
"No, it isn't. Mine is white. It's Lucy's," says Tina.
Mike goes to Lucy and says, "Is this your ruler, Lucy?"
Lucy says, "Yes it is. Thank you."
"What about the red dictionary? Is it yours, too?" Mike asks.
"No, it isn't," says Lucy. "The blue watch and the black pen aren't mine. You can put(放) them in the lost and found box."
"OK." says Mike.