Not any of the ones I've ever seen!
So "the children are clean" (not accepted) would be more common than "children are clean."
Quite right. Hope you reported it!
I have had a steady stream of my older reports accepted in the last few days (May 2018) so it looks like they are now finding time to fix these problems. They've got a lot to get through, though.
what does this mean? is there a carwash for children before they go to school?
...? They are clean children