Topic: No sound!
I haven't had any sound on the 'listening' exercise for a few months now - anyone else had the same problem?
Hover your mouse over your name in the blue banner at the top of hte page and click "Settings". Do you have your speaker(s) enabled?
If that's not the issue, then see if this "Help" article sheds any light on your problem: https://support.duolingo.com/hc/en-us/articles/204882510-My-sound-is-not-working-What-can-I-do-