Final answer:
The missing verb in the statement should be one that implies textbooks are neglecting to address a particular low point in detail. Context clues from the text would guide the appropriate choice of verb. This type of question is relevant to high school English, focusing on reading comprehension and critical analysis.
Step-by-step explanation:
The statement "Textbooks never ___ the nadir and its worsening." appears to have a missing verb and is discussing the coverage of a particular low point and its deterioration in textbooks. This could pertain to a specific historical event, a point in a literary plot, or a moment in some other field of study that is regarded as a low point. The blank should be filled in with a verb that correctly describes what the textbooks fail to do regarding this nadir. Common verbs that could fit in this context might include 'address,' 'cover,' 'acknowledge,' or 'detail.'
In understanding this sentence and providing potential verbs to fill in the blank, it's important to use context clues from surrounding text to gauge the correct word choice. As your question suggests a negative connotation, we focus on verbs that imply a lack of attention or omission in treatment. This understanding is important in reading comprehension and critical analysis, both of which are key skills in high school English.