1. I have been donating money to environmental organisations for the last five years. (donate)
2. I have been volunteering at the zoo for a year already! (volunteer)
3. It has been raining for two hours and it won't stop! (rain)
4. The students have been trying to reduce pollution. (try)
5. We have been working hard to raise awareness of environmental problems. (work)
6. Acid rain has been destroying natural habitats for years. (destroy)
Fill in the question tag
John has already went to the pond, hasn't he?
Ben has called his dad, hasn't he?
Some species of tiger are endangered, aren't they?
Camels live in the desert, don't they?
John didn't collect the cans and newspapers, did he?
