1. 选用方框中所给词的适当形式填空。

old, quick, copy, develop, cause

1. （1） I kept English words the whole afternoon.
3. （2） Education is important to a country's .
5. （3） You should listen to the advice of your brother.
7. （4） The girl is always trouble for people.
9. （5） I'm good at swimming, and I can swim .