"I always read the newspaper on Mondays."
Translation:Yo siempre leo el periódico los lunes.
It worked for me, that's exactly what i used. My guess is you made some other error.
It's probably not in the database yet. With this new tree, users are going to have to use the report button to get additional choices added as correct answers.
Could someone please explain why 'Leo el periodico siempre los lunes.' incorrect?