Final answer:
The correct word to complete the sentence is 'al cine'.
Step-by-step explanation:
The correct word to complete the sentence is al cine.
'Al cine' means 'to the cinema' in English. So the complete sentence would be 'Prefiero ir al cine para ver una película con mis amigos', which translates to 'I prefer to go to the cinema to watch a movie with my friends'.
This word choice is suitable because it aligns with the context of going to watch a movie with friends, while the other options (a la biblioteca, a la iglesia, al parque) are not relevant in this context.
Learn more about Completing sentences in Spanish