根据文章内容，回答下列问题。

    I'm John and this is my brother, David. I'm tidy, but David is not. In our room. my books and tapes are in the bookcase. My red tape player is on the desk and my keys are in the schoolbag. I have a watch. It's blue and it is on the desk, too. David's books are everywhere - on the bed, on the sofa and under the chair. The white model plane is his. It's under the bed. He always asks." Where's my ruler? Where's my schoolbag?"