"¿Tú quieres leche?"
Translation:Do you want milk?
Querer usually means to want something, or to like/love a person. Duo uses gustar for like something: Do you like milk? ¿Te gusta la leche?
You only report the audio if the words are pronounced incorrectly, if some words are left out, or if it just sounds wrong.. Not if it doesn't sound like a question. The question mark here is what helps; there was no need to report it.