1) Раскройте скобки в Present Perfect или

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. 11. This is the factory where my father works. He has been working here for fifteen years. 12. Have You found your note-book? — No! I am still looking  for it. I have already been looking for it for two hours, but haven't found  it yet. 13. You have been playing  with a ball for already three hours. Go home and do your homework. 14. Wake up! You have been sleeping for ten hours already. 15. I have been waiting for a letter from my cousin for a month al­ready, but haven't received  it yet. 15. It is difficult for me to speak about this opera as I haven't heard it. 16. I have  justreceived a letter from my granny, but I haven't yet recieved  any letters from my par­ents. 17. The weather is fine today. The sun has been shining ever since we got up. 18. Every day I wind up my watch at 10 o'clock in the evening. 19. Come along, Henry, what are you doing now? I have been waiting  for you a long time. 20. Where are your gloves? — I have put them into my pocket.

Объяснение:

как то так