"They read a letter."
Translation:Elas leem uma carta.
"Leem" sounds weird in the audio. Is it pronounced "leem" or "lee-ehm"? (The same way "em" sounds in "comem").
That would vary from person to person. The ones that care more about would say "lê-em" (the way both words are usually said in Portuguese).
The ones that don't care much would say "lêm" (more like "lê" than "em")
When there is no audio is so wrong that they don't take the translation Elas / Eles as the same in this specific sentence, given that in English the pronoun "They" is used equally for males or females.