Here is the sentence:

On his way to an interview, Gonzalo __________ a hot dog to quiet his rumbling stomach. While he was wolfing down this quick meal, yellow mustard dripped all over 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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