Open the brackets and pat the verbs into the proper tense, either the Present Continuous or the Present Perfect Continuous

1. Don\'t come in! He is taking an exam. He has been taking his exam for half an hour already. 2. Where are the children? — They are playing volleyball. They\'ve been playing volleyball since two o\'clock. 3. I have been learning to type for a month and can say that my typing has been improving. 4. Nick has come round to see as tonight. 5. He has been staying at his sister\'s for six weeks. He is trying to find somewhere to live. 6. We can\'t dance as my father is working in the study. He is preparing a report. He has been writing it for the whole day. 7. Do you see what the child is doing with your hat? Take it from him. 8. Are they still discussing the article? But they\'ve been doing it since twelve o\'clock! 9. The prices have gone up! They have been rising since 1991. 10. What a strong wind is blowing! It has been blowing since yesterday.