补全对话。（10分）
Bill: What’s that in your book, Kate?
Kate:1. ______________________________.
Bill: A nice room！2________________________?
Kate: It is a computer on the desk.
Bill: 3____________________?
Kate: Yes, it’s mine. I often use(使用) it.
Bill: What’s that in the bookcase?
Kate: It is a model plane.
Bill: Is it your model plane?
Kate: No, it isn’t mine. 4.____________________________.
Bill: 5.____________________________________________?
Kate: It is my brother’s , too. And the tape player on the bed is mine.
