"Why do I have to pay?"
Note that if you get the word qatlh (why) in the female voice on a tile in this, or any other exercise, you're actually going to hear the word Qatlh which means slime devil (a kind of alien animal).
It sounds terrible to me, and is in no way going to help you learn to differentiate the sounds. It's a very frustrating aspect of Duolingo that we can't record the two words with different sounds. I hope you can listen to the whole sentence, then listen to the tile, and notice for yourself that they are different words.