Synthesized answer
The provided passages do not specify what questions remain unanswered in the book "Apology."
The passages describe the structure and content of "The Apology," explaining that it is Plato's version of Socrates' defense against charges of corrupting the young and not believing in the city's gods [Passage 1]. It is divided into three parts: Socrates' defense, the verdict, and the sentencing [Passage 1]. The defense includes Socrates' recounting of the Oracle at Delphi and his cross-examination of Meletus [Passage 1]. However, there is no information within these passages about any lingering unanswered questions.
Synthesized from the book passages below. Chat with the book on Feynman for follow-up.
From the book
Title: The Apology, Phaedo and Crito of Plato; Golden Sayings of Epictetus; Meditations of Marcus Aurelius by Charles William Eliot, Πλάτων, Epictetus --- Google Books --- Title: Apology by Plato Description: The Apology is Plato's version of the speech given by Socrates as he defended himself in 399 BC against the charges of "corrupting the young, and by not believing in the gods in whom the city believes, but in other daimonia that are novel . Apology here has its earlier meaning (now usually expressed by the word apologia ) of speaking in defense of a cause or of one's beliefs or…