Review the item:
In her dreams that night, Diana had __________ in a pool of warm cocoa; when she awoke, the aroma of chocolate still tickled her nostrils.

The blank requires the past participle of swim, an irregular verb. Swum is the past participle.

Verb Simple
Present
Simple
Past
Past
Participle
swim swim(s) swam swum

Swimmed, the form you chose, is a spelling error. Before you continue, review the rules for irregular verbs.

Go back to the item to try again.