1.They live happily in a small village
2.You should spend your money and energy as the economy as possible
3.You can buy waste produce make from this factory
4.This library is open to all read
5.Air and water is necessary for our life
6.My brother can repair electric apply very well
7.This innovate will conserve the earth
8.Since the world's energy resources are limited, we must conservation them
9. We suggest replacing the light bulb. It is broken
10.To keep the air unpolluted, people ought to use solar energy to create electricity
