Alquilaras is the right answer
"se" goes in the blank. Ellos se van a esconder.
This story makes no sense... Could I get a summary of what the story is supposed to be about? I mean, you could also use Google Translate...
- Qué hacías anoche ??
_____________________
Tu familia te estaba ayudando ??
___________________________
Entonces, no estabas en la fiesta ?
_____________________________
The lines are equivalent to what is already in the book.
