They( to sing) caarlos in the yard now. (-,?, what, where, when, who)

They are singing carols in the yard now.

They aren’t singing carols in the yard now.

Are they singing carols in the yard now?

What are they singing in the yard now?

Where are they singing carols now?

When are they singing carols in the yard ?

Who is singing carols in the yard now?