下列关于货币的说法正确的是( )。

A．货币具有直接同所有商品相交换的能力

B．货币是固定充当一般等价物的特殊商品

C．货币体现一定的生产力水平

D．货币采取了具有一定属性的自然形式

E．货币是表现一切商品价值的材料

阅读短文，用动词的适当形式填空。

        1   ( look) at the picture. It's a picture of a classroom. What can you   2   (see) in the classroom? I

can see a big desk in the front of the classroom Some books   3   (be) on the desk. What other things

can you see on the teacher's desk?  I can see two white books. There   4   (be) some chalk in them.

Where   5   (be) the brooms? They are behind the door.