One of the boys (not / wear) a coat.
One of the boys isn't wearing a coat.
Some of them (talk) to each other.
Some of them are talking to each other.
Look at the photo. What ___ they ___ ?
What are they doing?
Look at the photo. They ___ (not be) at school. Why not?
They aren't at school.
Look at the photo. Why ___ they ____ (wait) there?
Why are they waiting there?