Put the verb in brackets into the Present Perfect Continuous:

1. I ________________________ on this problem for two weeks. (to work)

2. Kate is red all over. She __________________________in the sun since morning. (to lie)

3. You are dirty all over. What you__________________________ (to do)?

4. They ______________________________ for me for an hour. (to wait)

5. We _______________________________ English for two years. (to learn)

6. You look tired. – Yes, I ____________________________the flat all day. (to clean)

7. What happened to Mary? I ___________________________ her the whole evening and nobody answers. (to call)

8. My friend ______________________________ football since childhood. (to play)

9. Open the window. Somebody ____________________________here. (to smoke)

10. I __________________________________ my key for an hour and I still can`t find it. (to look for)