"A morning and an afternoon?"
Translation:Ráno a odpoledne?
Se the Tips and notes about pronunciation. And read about voicing assimilation https://en.wikipedia.org/wiki/Czech_phonology#Assimilation_of_voice.
You really have to be specific. Comment under the wrong sentences, not here. Be sure to read the discussion first. Do also read https://forum.duolingo.com/comment/28047586/Help-please-Report-hint-audio-Nelze-naj%C3%ADt-text-k-p%C5%99ed%C4%8D%C3%ADt%C3%A1n%C3%AD-for-other-words-than-%C4%8D%C3%AD-here