1. People should stop driving private cars.
2. People should save energy.
3. We shouldn't hunt rare and endangred animals.
4. You should use paper economically.
5. People shouldn't cut down trees.
***
1. I was introduced to Mr Felix last year.
2. Large areas of forest are being destroyed every day.
3. The land next to our house has been bought.
4. The accient had been already reported before i phoned.
5. The tennis court was being used, so we couldn't play.
6, Videos like this one can be bought anywhere.
7. You will be told when you should go in to see the doctor.
8. Have you been shown what to do?
9. The hotel should have been finished by the time you arrive.
10. The history of the European Community has to be written one day.
11. I wasn't told that George was ill.
12. An unexploded bomb has been found in Herbert Square, and they are evacuating the area.
Bn học tốt!!