Hey there, I think there's a small mistake in lesson 10.5 : The examples for the idiomatic pronominal forms are titled wrong - "Je demande à Célin son adresse" is titled "idiomatic pronominal form" and "Nous nous demandons où ils sont" is titled "non-idiomatic pronominal form" instead of the opposite.
Regards, Yoni
Regards, Yoni