1. Take an umbrella. It will rain today, I'm sure.
2. From today, we won't trow things away; we will reuse them.
3. I think I will walk to school; I won't take the bus.
4. Turn the tap off so you won't waste water.
5. They are cutting down all the trees: they will destroy the forest.
6. Can I use your pen? I will give it back to you soon.
