Раскройте скобки,употребляя глаголы в требующейся форме так чтобы получить Present Continuous или Present perfect.
1)What are you (to do) here? - I am (to write) a letter to my friends. 2. Who has (to write) this article? 3. What language are you (to study)? 4. We have already (to lern) a lot of English words. 5.What is she (to teach) them?

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 learnt a lot of English words. 5.What is she teaching them?

1. doing writing2.written3.studying4.learnt5.teaching