1. 用方框内所给单词或短语的适当形式完成下列句子（有一项多余）

pollute    usual    healthy    clean up    waste    hope

1. （1） You should give up your habits.
3. （2） I am about the future. I think my life is getting better and better.
5. （3） I will tell you something about reducing in our everyday life, like riding a bicycle instead of driving a car.
7. （4） My sister is an pianist.
9. （5） Mary is ill again and I think she is kind of .