1. 根据句意及首字母提示补全单词。

1. （1） We shouldn't f for a small thing.

3. （2） My father was always a when I did something bad.
   

5. （3） N is too difficult if you put your heart into it.

7. （4） You should f your homework first before playing games.

9. （5） G is father's or mother's father.