Ответ:

11 не увидел

Объяснение:

1. He  is running  now. He has been running for ten minutes without any rest. 2. What are  they doing  now? — They are working  in the reading-room. They have been working  there for already three hours. 3. Where is    he  now? — He is   in the garden. He is playing  vol­ley-ball with his friends. They have been playing since break­fast time. 4. I  live in St. Petersburg. I have lived  in St. Petersburg since 1990. 5. She has already been doing her homework for two hours; but she has not yet done half of it. 6. I have been waiting for you since two o'clock. 7. What are you doing? — I am reading. I have already been reading for two hours. I have already read sixty pages. 8. This man is a writer. He writes books. He has been writing books since he was a young man. He has al­ready  written eight books. 9. What have you been doing here since morning? 10. Lena is a very good girl. She always helps her mother about the house. Today she has been helping her mother since morning. They have already washed the floor and dusted the furni­ture. Now they are cooking dinner together.