Final answer:
The best word to complete the sentence is 'sentimental' as it reflects Jeremiah's nostalgic and emotional state when looking back at his high school memories.
Step-by-step explanation:
The best word to complete the sentence would be sentimental.
Jeremiah is looking back on his memories with nostalgia and emotion, which is reflected in the word 'sentimental'.
This word indicates that Jeremiah is feeling a fondness for his high school experience and the memories associated with it.
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