3. Complete the sentences using Conditional II and Conditional III.
1) If people ___ ( to avoid) damaging nature many species of animals wouldn’t have disappeared.
2) If we did not pollute our seas, they ___ ( to be) full of fish.
3) If people had thought about their future, they ___ ( not to cut) down forests.
4) Ann ___ ( to behave) well if you took her to the party.
5) If we ___ ( to take) care of our planet, we wouldn’t live among litter and waste.