Take another look at the sentence:
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 sentence requires the past participle of wear, an irregular verb. Worn is the past participle form.
|Verb||Simple Present||Simple Past||Past Participle|
Weared, the form you chose, is a spelling error. Before you continue, review the rules for irregular verbs.