Раскройте скобки, употребляя глаголы в требующейся форме, так чтобы получить Present Contious или Present Perfect. 1.

1. What are you doing (Present Continuous) here? — I am writing (Present Continuous) a letter to my friends. 2. Who has written (Present Perfect) this article? 3. What language are you studying (Present Continuous)? 4. We have already learnt (Present Perfect) a lot of English words. 5. What is she teaching (Present Continuous) them? 6. Who has taught (Present Perfect) you to do it? 7. He has just done (Present Perfect) something for us. 8. Have you found (Present Perfect) the book? 9. What are you looking (Present Continuous) for? 10. What are you talking (Present Continuous) about?