阅读下列材料，从每题所给的四个选项 （A、B、C、D） 中选出最佳选项。

    This is Mary's room. It's a big and nice room. It's bright and clean. There are some pictures on the front wall. On the back wall there is a map of China.

    There is a desk and a chair in her room. The desk is near the window. Her bag and pencil—box are on the desk. There are some color pencils, a pen, a short ruler and a knife in the pencil—box. Mary's bed is near the desk. Her shoes and a ball are under the bed.

    Mary and her friend Kate are often in the room. They likeitvery much.