Review the item:
Whenever Mike _________ his Cessna 152, a small airplane, he worried about running out of fuel, hitting birds, and being abducted by alien spaceships.

The blank requires the past tense of fly, an irregular verb. Flew is the simple past form.

Verb Simple
Present
Simple
Past
Past
Participle
fly fly(ies) flew flown

Flown, the form you chose, is a past participle; to use it, you would need an auxiliary verb. Before you continue, review the rules for irregular verbs.

Go back to the item to try again.