1. Peter has opened the window.
Has Peter opened the window?
What has Peter opened?
Who has opened the window?
2. We have read a very good book.
Have we read a very good book?
What have we read ?
Who has read a very good book?
3. Mary has lost her dog.
Has Mary lost her dog?
What has Mary lost?
Who has lost a dog?
4. My friends have gone to school.
Have my friends gone to school?
Where have my friends gone?
Who has gone to school?
5. They've seen an interesting film.
Have they seen an interesting film?
What they have seen ?
Who has seen an interesting film?
6. Misha's been to London.
Has Misha been to London?
Where has Misha been?
Who has been to London?
7. You've bought the book.
Have you bought the book?
What have you bought?
Who has bought the book?
8. We've finished our work.
Have we finished our work?
What have we finished?
Who has finished our work?