Here is the item:
Diane always wonders where she will next discover a pair of her husband's dirty socks. Yesterday Mike __________ two in the refrigerator next to a carton of orange juice.

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

Verb Simple
Present
Simple
Past
Past
Participle
leave leave(s) left left

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