My question does not directly concern this particular sentence, it's actually a question about questions in general. I would like to know how to tell when the sentence in the audio is a question and when it isn't. At least in English and Spanish it's easy to find out because in the end of the sentence the intonation usually goes up. Is this the case in Portuguese as well? Until now I have been thinking that it's just because of Duolingo's audio quality but now I'm not so sure anymore.