"To Be" Completed
I recently finished the Objects skill and looked at my tree to see that the "To Be" skill already golden. I think that this feature is really neat. I like the idea of extra practice if you need it, and none if you don't. Thanks Duo!
That's just due to the skill's placement on the tree. You have already worked with enough ser/estar sentences by then to have a general idea of the concept, so it's automatically golden. The only case in the Spanish tree. :)