1) Who is sleeping?
What are you doing in your bed?
Where are you sleeping?
What are you doing?
2) What are you doing?
When are you swimming?
Who are slwimming?
What are you doing right now?
3) Who is drawing?
What is she drawing?
What is she doing?
What a picture is she drawing?
When is she drawing a nice picture?
4) Whose pets are eating now?
What are your pets doing?
When are your pets eating?
Who are eating now?