French language Q&A Forum

I'm still somehow confused on when to use des vs. les. For example, in the translation exercises,

"and boys can play with dolls" is translated to "et les garçons peuvent jouer avec des poupées".

But I thought it should be LES poupées because it's referring to dolls (in general). Is this a case of either one working?

Est-ce-que tes affaires sont dans la valise?

If want to use y in this sentence, can I say, " ils y sont"?

I wonder, what's the matter with question 1 in the quiz. I answered it 4 or 5 times and each time the result was the same three out of four! But I didn't mark the answer which says ICECREAMS, so I'm disappointed 

I couldn't tell the difference among 'Je suis allé '(mas) et 'je suis allée'(fem)  ou 'nous sommes allés' et 'nous sommes allées'  from the audio. In everyday speech, is there any change in pronunciation?

Is que (qu') + inversion only used with subject pronouns? I noticed this with the examples given. If the answer is 'yes', it may be helpful to draw attention to this fact in the lesson

Où habites-tu? j'habite à Barcelone.

Why using ( en ) instead of (à ) in this sentence is incorrect?!