Here is the item:
On his way to the interview, Gonzalo __________ a hot dog to quiet his rumbling stomach. While he was wolfing down this quick meal, yellow mustard dripped down the front of his crisp white shirt.

The blank requires the past tense of buy, an irregular verb. You chose bought, the correct form. Well done!

Verb Simple
Present
Simple
Past
Past
Participle
buy buy(s) bought bought

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