—I'm Kitty．

⑴Is this your desk?         A．Yes，I am．

⑵What is it?               B．No，it isn't．

⑶What can you see?       C．It's a fish．

⑷Is she Mary?             D．I can see two apples．

⑸Are you a sheep?         E．Yes，she is．

  Alice：Hi，Peter, is this your pencil?

  Peter：No．I don't have a pencil．

  Alice：Mary，is this your pencil?

  Mary：No，it isn't．My pencil is yellow．

  Alice：John，is this your pencil?

  John：No．Look，this is my pencil．My pencil is blue．

  Joe：I can't find(找到)my pencil．It's green．Do you see it，Alice?

  Alice：Is this your pencil?

  Joe：Yes，it is．Thank you，Alice．

—He's my(brother／sister)．