Apostrophe missing after "parents" in the word bank.
The preposition should be equally "at" and "in." Yes technically and physically you sleep "in" your parent's house but locationally you sleep "at" your parent's house
How about "I will sleep in/at my parents' house tomorrow"? Marked incorrect. And also; can you write "Eu vou dormir na casa dos meus pais amanhã"?
Yes, they are also correct.
at my parents´house is also correct
What about: »I will sleep in my parents' house tomorrow»?
How come i need to put Eu? Why not just vou?
Why the answer without 'eu' was rejected? On top of it there is no 'eu' to choose from.