Complete the sentences using the Present Perfect Continuous form of the verbs in brackets.
1. He the environment for over ten years. (study)
2. We hard to build nesting boxes. (work)
3. It for two days. (not/rain)
4. He money to Greenpeace for a long time. (donate)
5. The government to reduce pollution for years. (try)
6. I to clean out ponds for a year now! (volunteer)
7. ___Tony (talk) on the phone for two hours?
8. I (look) for my keys since 11 a.m.
9. you (wait) for the bus for 20 minutes? 10. She (play) computer games for 50 minutes.
11. They (not/live) in Moscow since January.
