=>
I/
1. We should try to recycle rubbish.
2. Don’t throw the plastic bags because you can reuse them.
3. You should use reusable bags when you go shopping.
4. If the river is polluted, fish will die.
5. If people cycle more, there will be less pollution.
II/
1. Unless we try to save our sources of energy, they will soon end.
2. If I don't have a modern robot, I won't be able to do everything myself.
3. The plan to make this beach a clean and beautiful place again.
4. If we plant more trees, the air will be fresher.
5. If we use the car all the time, we will make the air dirty.
