Duolingo too repetitive
Duolingo is too repetitive. You get the same phrase like ten times in one lesson!!!
So you learn the phrase... not the grammar. And specially not building vocabulary.
As 1km said do more translations for vocabulary. But I agree Duolingo sometimes can get repetitive, especially when the same sentence is given right after that sentence was used in the previous question. They should at least insert some other question in between before asking the same sentence again.