Today I have finished learning last level of Duolingo English Course for Polish speakers. Of course I cannot not just leave it. We all forget pretty fast so I am going to refresh it every day as I used to learn it every day.
As I stated previously Duolingo is best for for learning grammar and use of whole sentences. I highly recommend using it.
I do not really know how exercises 'translating articles' work in Duolingo but right now I want to focus more on learning more words on Memrise. I have a couple of courses that I am trying to learn for nearly a year.