2 We have.painted...... information posters in every classroom.
3 We have.collected........ over five tones of litter for recycling.
4 We have..planted...... fifteen trees in front of the school.
5 We have...replaced......... 50 light bulbs with energy-saving bulbs.
6 We .have.recycled....... 25 ink cartridges from computer printers.
7 We .have.shown........ three films about how to save energy.
8 We have. put up......... signs on all the doors reminding people to turn off the lights.
9 We have..installed.......... five new energy-saving heaters.
10 We have.organized.......... teams of students to turn off unused lights.