When asked to translate "Is he the mayor" to French, I wrote "Est-il le maire ?", exactly as Duo has written it above, but was chastised. Duolingo gave the correct translation as "Est-ce le maire ?" I did not understand why, but did not report anything as I thought that I must be in error. Now I see that according to this reverse translation scenario I was correct previously. Or was I? I am confused. Please help.