noun
a word that represents a person, place, thing, or idea
preposition
a word that shows the relationship between a noun or pronoun and other words in a sentence
article
a word that is used to indicate whether a noun is specific or unspecific
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As a gesture of goodwill, the restaurant offered us a complimentary dessert on the house.
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The bartender gave us a round of shots on the house for being regular customers.
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The server hooked us up with some extra fries on the house.
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The company decided to cover the cost of the team building retreat, so it was essentially on the house.