Ⅰ、1、headquarters
2、permanent
3、situation
4、agreement
5、satisfy
Ⅱ、1 - 5 D A B C D
Ⅲ、Ⅰ、Why not
2、I haven't got a pet yet
3、You'd better not keep a dog
4、Then I'll have a cat
5、they are quiet
Ⅳ、1、Do as I do it.
2、She behaved with great courage
3、My mother drives me to school.
4、Who will give a speech today?
5、I have been learning English these years.