What is The Duolingo plus quiz ???...
Maybe a new learning quiz and revival of the old 2016 available "progress quiz" from the "lingot store".
Have you tried it?
A/B experiments on learning quiz, reading listening, writing, CEFR selection: https://www.duolingo.com/comment/27318365
Duo Exams: https://forum.duolingo.com/comment/27332078
Yes I did it is very good it's like Practice but it's only on the app practice but it's only on the