1. 用方框中所给单词的适当形式填空。

sky   pollute   sea   few   little

1. （1） Look! There is a plane flying in the.
3. （2） Lots of fish are swimming in the.
5. （3） Don't put waste water into the river, or it'll be more.
7. （4） In the future, there will beschools because students study at home on computers.
9. （5） —Why will you need  workers?

   —Because there will bework.