French language Q&A Forum

Referring to “vous adorerez cette autre idée : modifier un pyjama en flannelle défraîchi.”

for

“you will love this other idea: making alterations to a pair of faded flannel pyjamas.”

I can only find “flanelle” (one “n”, not two) in the dictionaries. And this is a female noun. So should these answers all be “…en flanelle défraîchie.”?

In the third line of the dialog, if using inversion "Savez-vous à quelle heure nous atterrissons?", the audio in the exercise has several extra words that do not match the text. I can't remember exactly what they were but at the beginning it says "Pascal", like there were cues for the dialog that were being read as the dialog.

Shouldn't it be "Elle a dû l'oubliée?" [She must have forgotten it.] 

Here, Oublier is infinitive form of the verb which means - to forget. So, in this example isn't it translated to - She must have forget about it, which doesn't sound right. How can it be translated to '...forgotten it.' which is past tense?