1. 根据句意及首字母提示完成单词

1. （1） They went for walks together in the f.
   

3. （2） I want a l box , this one is too small.
   

5. （3） It is important for us to p the Earth for our future.
   

7. （4） Plants absorb(吸收) e from the sun.

9. （5） We shouldn't p our environment.