若文件系统容许不同用户的文件可以具有相同的文件名，则操作系统应采用（）来实现。

A．索引表

B．索引文件

C．指针

D．多级目录

用表示“看”的单词或短语填空，注意形式正确。

1. Li Lei often _____ TV.

2. Miss Wang likes _____ books.  

3. _________! Someone is dancing on the playground.

4. The old man often _______ football matches.

5. I _________ the blackboard, but I can't ______ any words on it.

6. What magazine do you _______?

7 _____ the picture on the wall.  

8. ____! Here comes the bus.