Review the item:
All of Charlie's hopes sinked when the telephone rang and the beautiful Delores told the eager young man that she did not have time to study calculus that evening.

The first verb, sinked, is the problem. The sentence requires the simple past. Sank is the correctly spelled form.

Verb Simple
Present
Simple
Past
Past
Participle
sink sink(s) sank or sunk sunk

Told, the verb you chose, is perfectly correct. Before you continue, review the rules for irregular verbs.

Go back to the item to try again.