nós bebemos

[YellapNave]

I understand that this may very well be the past tense as well, but the default answer should be, I think "We drink" not "We drank," because this is confusing in conflict with the other tenses. I think, however, "We drank" should be accepted too, be because they are the same conjugation.

[JareeZy]

Agreed, both present and past tense should be accepted.

Also, I don't remember the exact sentence (will update this post If I encounter it again) but in some cases duolingo wants the future tense although the verb clearly isn't in future tense but in the present/past tense.

[patby19]

That was a curve ball all right!

[Simoziko]

When we use something everyday we use the present. Nós bebemos chá
If you are talking about the past we can say. Nós bebemos cerveja com nossos amigos ontem.

[Itainov]

right.