1. Please give me a pencil, I have lost mine.
2. I haven't met Peter since Monday.
3. Nina has just finished work.
4. Where is Sergei? — He went home. He has left the room a minute ago.
5. What are you reading now? — I am reading "Jane Eyre" by Charlotte Bronte.
6. They have read "Ivanhoe" by Walter Scott a month ago. What about you? Have you read "Ivanhoe"?
7. My watch have stopped. There is something wrong with it.
8. Have you seen Jack today? — Yes, I have seen him at the institute.
9. You heard the new symphony by M.? — Yes, I did . — When did you hear it? — I heard it last Sunday.
10. You've changed so much. Has anything happened?
11. What are you doing here at such a late hour? Are you writing your composition? — No, I have written it already. I am working at my report. — And when did you write your composition? — I have finished it two days ago.
12. I say, Tom, let's have dinner. — No, thank you, I have already had dinner.
13. What the weather is like? Is it still raining? — No, it has stopped raining.