用括号内所给单词的适当形式填空。  

1. When I arrived at the park, I saw those children ______(play) football on the grass.  

2. The headmaster asked us _____(not be) late for school.  

3. Can you tell me how _____(get) to the Children Palace?  

4. He will call you back as soon as he _____(come) back.  

5. The Green family live in the ____(center) part of the village.

由IEEE管理、硬件制造商指定，任何两个网卡都不会相同的是（）

A.IP地址

B.软件地址

C.物理地址

D.逻辑地址