Last summer vacation, I took part in ‘the green summer campaign’ which offered a lot of ___________ work to help the community. 2. ‘Go Green’ is a ___________ organization that usually holds some communal activities to protect the environment. Would you like to join it? 3. ___________ must be protected by every single one of us. It provides us with fresh air, habitats, clean water and other necessary things we consume every day. 4. Keeping your houses clean, planting more trees and eating healthy food are all good pieces of advice that are _____________ your health. 5. We have just received a ___________ of 1,000,000 VND from an unknown man. 6. My students collected garbage on the streets and beaches in the neighborhood in the hope of ______________ and raising people’s awareness. 7. A lot of people in the world ___________ to help people in the earthquake in Haiti. 8. A simple action of picking up a piece of garbage also ___________ your community, which helps the streets cleaner and nicer. 9. I am going to ___________ a birthday party next week. Would you spend a little time coming over? 10. Trees ___________ us with fresh air and shadow. They are so beneficial. 11. He wants to become a(n) ___________ in the future in the hope of contributing more to solve some dangerous environmental problems. 12. We usually ___________ old clothes to charity. That makes us really happy.