II. Rewrite the sentence so that its meaning stays the same.
1. They intend to make this beach a clean and beautiful place again.
à They plant ..............................................
2. The students started to collect old clothes for their charity programme last week.
à The students have .......................................
3. We make the air dirty because we use the car all the time.
à If we use ...................................................
4. If I don’t leave now, I’ll miss my train.
à Unless I leave ..........................................
5. I won’t be able to do anything unless I have a quiet room.
à If I don’t have .................................................