1. What are you doing here? - I am writing a
letter to my friends. 2. Who has written this article? 3. What
language are you studying? 4. We have already learned a lot of
English words. 5. What is she teaching them? 6. Who has teached you
to do it? 7. He has just done something for us. 8. Have you
found the book? 9. What are you looking for? 10. What are you
talking about? 11. We have just talked about it. 12. He has just
said something about it. 13. She is telling them some interesting
story. 14. He has told us nothing about it. 15. She has told
them some stories about dogs. 16. We have had two lessons today.
17. They are having a meeting. 18. She has not spoken yet. 19.
They have asked me several questions. 20. He has already learned
the rule. 21. I am writing an exercise. 22. What is he doing? - He
is reading a newspaper. 23. Have you read any stories by Jack
London? 24. I am answering the telephone right now. 25. He has
fixed his car and now he is not having any trouble with the brakes
anymore. 26. Have you just heard tomorrow's weather forecast? 27. I
have read this interesting book lots of times. 28. I don't think he
has ever done it.