Answer:
the celebratory dinner
Explanation:
the sentence is basically about the dinner, and roast beef & mashed potatoes is what the subject (the celebratory dinner) <em>is.</em>
<u><em>Presidents Have hardwork to do.They make educational laws to help the community kids better.They also make safety laws against injury.Schools are supported and aided with anything needed.They also make restaurants better.Presidents sign in laws for the nation.
(Talking about president.)
Wishing you happy days!
</em></u>
