Difficulty: Easy
Correct Answer: but
Explanation:
Given data
Concept/ApproachThe exact line is "The paths of glory lead but to the grave." Here but functions as an adverb meaning "only."
Option analysisbut — correct and idiomatic in the historical quotation. ✅straight / directly — alter the meaning and are not in the source text. ❌in — wrong word class for this slot. ❌
Final Answerbut
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