Here is 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. As you know, the sentence requires the simple past. Sank is the most common correctly spelled form.

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

Go to the next item.