1. He has been working at his report since 10 o'clock. 2. They have been writing their test for nearly two hours already. 3. She has been waiting long. 4. His daughter has been playing the piano since the morning. 5. They have been discuss- ing this problem for rather a long time. 6. The child has been sleeping too long. 7. Ann and Roger have been quarrelling for fifteen minutes. 8. She has been dreaming to become an actress all her life. 9. I have been doing my lessons since 4 o'clock. Porfect ​

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