It happens sometimes. I certainly have cards I don't recognize in my review from time to time. I think sometimes it doesn't show all of the cards from a lesson originally, but once it's passed they're added for review. Or during a lesson originally, it doesn't always list everything included.
The idea is that it doesn't matter if you get it right or wrong now; it'll expose you to the correct answer anyhow.
If you're a perfectionist like me and starting out in a language, it can be hard, but you do start to pick up the important bits quite strongly.
Just gotta be willing to accept that you'll see things you didn't know, and be expected to pick them up as quickly as possible! And don't worry if you get it wrong the first few times; get closer. :-)
Ah, cool. Well then I added extra confirmation for Maxx02 and whoever else may read. :-)
I'm really enjoying this site. Exactly what I've been thinking about and watching for for [sic but questionable] a while now. Duolingo is apparently not that new, but at least I found it now!
Hello! Can someone explain why "He puts vegetables in the soup." is wrong for this one? I thought verbs showing "in the process of" require "en train de". I am so confused. Merci!