1. 从方框中选择合适的单词，并用其适当形式完成句子

advantage   litter   fisherman   wood   science

1. （1） in public is bad manners. Don't do that again.
3. （2） Two saved the girl from the lake.
5. （3） I want to learn about the of living in big cities.
7. （4） Mike put all the toys he played with when he was young into the box.
9. （5） Most students in our class went in for activities last week.