Right answer:
never
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Explanation:
The answer is never because this translates into nunca. So this is an adverb of time. Adverbs of time give information on time, duration, and frequency answering questions like When? and How often? Recall that an adverb is a word or group of words that describes or modifies a verb, adjective, another adverb or a whole sentence. So I never eat red meat (Yo nunca como carnes rojas).
