A middle school English question, online

Fill in traditional or a tradition are both correct.

It's a separate sentence, so as long as it fits the grammar and meaning, it's fine. Filling in traditional, "traditional," with an adjective as an epithet, and a tradition, "traditional," with a countable noun as an epithet, are both in order and correct.

Personally, I think a tradition is better. The reason is that this kind of filling is more common and more in line with the custom of English.

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