Here is the item:
If Carlos had known that hail the size of golf balls would fall later that day, he would have __________ his shoulder pads and football helmet instead of his one good suit.

The blank requires the past participle of wear, an irregular verb. You chose worn, the correct form. Hallelujah!

Verb Simple
Present
Simple
Past
Past
Participle
wear wear(s) wore worn

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