E. Complete the sentences using Present Perfect Continuous. 20.lt for two days. (rain) 21 John for two hours now! (sleep) 22.How long you the environment problems? (study) 23.She to raise money for the zoo for months. (try) 24. He hard to build a nesting box, that's why it has already broken. (not/ work)

Here are the sentences completed using Present Perfect Continuous:

1. It has been raining for two days.
2. John has been sleeping for two hours now!
3. How long have you been studying the environment problems?
4. She has been trying to raise money for the zoo for months.
5. He hasn't been working hard to build a nesting box, that's why it has already broken.