Oui, I thought so too! But despite the pronunciation of Quelles/Quelles, fille/filles and apporte/apportent are indentical when separete, the liaison is mandatory to differentiate them! So it would be "quelles fille_ZZZ_apportent" Try it with google translate and you will notice the difference! My only doubt is with the liaison between apportent and un, like: "apporten_TTT_un" because it seems really weird in the google lady's voice haha! Is it mandatory as well?