Final answer:
The question is about filling in the blank with the appropriate Spanish word or phrase to complete a sentence.
Step-by-step explanation:
The subject of this question is Spanish, which is a world language. The question is asking for the Spanish word or phrase that best completes the given sentence, "Necesito una cita con el doctor." This sentence translates to "I need an appointment with the doctor." So, the answer to the fill in the blank is "una cita."
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