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.

“蜀道难，难于上青天。”蜀指的是

A．西藏

B．四川

C．云南

D．贵州