Final answer:
The correct term to complete the sentence is 'un hôtel'.
Step-by-step explanation:
The correct answer to complete the sentence 'J'ai réservé une chambre dans...' would be un hôtel.
This sentence is in French and it is asking for the completion of the phrase 'I booked a room in...'. Among the given options, 'un hôtel' is the correct term for 'an hotel'.
Example: J'ai réservé une chambre dans un hôtel à Paris pour mes vacances.
Learn more about Completing a sentence in French