Ответ:
What are you doing here at such a late hour? Ate you writing your essay? - No, I've already written it. I'm working on my report. - And when did you write your essay? - I finished it two days ago. 2. I say, Tom, let's have dinner. – No, thank you, I've already had dinner. 3. What is the weather like? It it still raining? - No, it stopped raining. 4. Please give me a pencil, I've lost mine. 5. I haven't been meeting Peter since Monday. 6. Nina has just finished work. 7. Where is Sergei ? - He has gone home. He left the room a minute ago. 8. What are you reading now? - I'm reading «Jane Eyre» by Charlotte Bronte. 9. They read«Ivanhoe» by Walter Scott a month ago. What about you? Did you read «Ivanhoe»? 10. My watch has stopped. There is something wrong with it. 11. Have you seen Jack today? - Yes, I've seen him at the institute. 12. Did you hear the new symphony by M.? - Yes, I Did. - When did you hear it? - I heard it last Sundау.