The correct answer to this is he heard her when she was unaware.
You could definitely use 'bushel' in a sentence.
Example: I went downtown with my grocery list, I had to get lunchmeat, cheese and a <em>bushel </em>of apples.
Example 2: I had an option when buying the fruits, I could get each banana individually or I could buy the entire <em>bushel.</em>
