ItwasgettingdarkWedecidedto________forthenightatafarmhouse

Pollution does great harm to our health. It’s necessary the environment.

There is still much room for improvement in our work, I see it.

here is less and less coal and oil,scientists are exploring new ways of making use of ______ energy, such assunlight, wind and water for power and fuel.

ly my brother but also I ____ good atpainting Both of us ____ good painters,