Why SpanishDict grammar test do not accept right answers?
Fo example here - explaination says, that "la que" is also correct, but when answering it is not accepted. It is very annoying. How I suppose to know which answer to choose if two (or more!) are correct?

1 Answer
Ah, the joys of learning a language by machine. Just because it could be used doesn't make it the best answer. This is all part of the learning process, and "How am I supposed to know which answer to choose...?"
From the machine translators you can see that the differences are not that drastic.
Ya conoces a mi hermana, acerca de la cual se oye tanto. You know my sister, about which we hear so much.
Ya conoces a mi hermana, acerca de quien se oye tanto. You know my sister, about whom we hear so much.
Ya conoces a mi hermana, acerca de la que se oye tanto. You know my sister, about which we hear so much.
Since we're talking about a person in this sentence, it would pretty much eliminate 'que', and personally, I would have said 'de quien', maybe because that's just the way I talk and I know absolutely nothing about grammar ![]()
The point is, don't be discouraged, the only answer to "How am I supposed to know...." comes through study and practice. And machine learning will always have these types of irritations ![]()