It listed "Are that our oranges," as the correct reaponse. This isn't correct English!
Duo translated this as , Are that our oranges? It should be , Are these or those.
i have translated: are these our oranges? But Duo blocked as a mistake, correcting with "those"!! Why??
You are of course correct. "Are these/those our oranges?" is right. I have noticed a number of similar mistakes in the past few months. Duolingo should correct them so as not to confuse English learners.
"Duolingo" (as in: Duolingo staff) doesn't maintain these courses any more.
There is the public course which is maintained by volunteers, and there are the Pearson courses which are maintained by, presumably, Pearson employees.
This is a sentence from the Pearson course.
Unfortunately, those leak over into the public course.
Is this because 'These' is posessive while 'Those' is neutral, and if you are asking the ownership you wouldn't use a possesive?
Yes, probably the best choice.
But the main thing is another: Duo did non used "they" but "those", correcting my "these".