Siempre estudio hasta la medianoche en la biblioteca.
I might be wrong, I can't quite remember if library is "biblioteca."
Answer:
Is the 3rd one (3.choco con.)
Explanation:
Is the one one that mekes sense i speak perfect spanish.
Answer: Esta
Explanation: there’s not a lot of context but it makes sense because esta means “is” and the sentence would translate to “he is in the class”