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Complete the royal advisor's official decrees for King Reginald's upcoming banquet.
His Majesty insists that every guest _________________________ a spectacularly silly hat during the feast, regardless of their noble rank. It is also my strong recommendation that the court jester _________________________ given a raise, lest we face another tragic pie-throwing incident.
The correct answers are wear and be.
After verbs of requesting/insisting (like insist) and nouns of suggestion (like recommendation), the following that-clause requires the subjunctive mood.
Even though "every guest" is a third-person singular subject, we drop the "-s" and use the base form wear. Similarly, we use the base form be instead of the indicative is, even for a singular subject like "the court jester".