Here is the item:
On Christmas Eve, Captain Beane wore a pair of antlers while greeting passengers boarding his 727. The costume __________ little trust in Louise, whose fear of flying required a serious pilot.

The blank requires the past tense of build, an irregular verb. You chose built, the correct form. Nice work, grammar brain!

Verb Simple
Present
Simple
Past
Past
Participle
build build(s) built built

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