复习11-15（500）

Chapter 11: The Duelling Club

Lockhart organizes a Duelling Club to teach students self-defense. During the first session, Snape and Lockhart demonstrate a duel, and then students pair up to practice. Harry ends up dueling Draco Malfoy, who conjures a snake that Harry can speak to in Parseltongue, a rare ability associated with dark wizards. This revelation causes fear and suspicion among the students, and many begin to suspect Harry might be the heir of Slytherin. The chapter explores the growing tension and distrust within the school and Harry's struggle with his own identity.

Chapter 12: Polyjuice Potion

Hermione finishes brewing the Polyjuice Potion, and the trio uses it to transform into Crabbe, Goyle, and Millicent Bulstrode to infiltrate the Slytherin common room. They question Draco Malfoy about the Chamber of Secrets but learn that he knows nothing about the attacks. However, they do discover that the last time the chamber was opened, a student died, and Hogwarts was nearly closed. The potion's effects wear off, and the trio narrowly escapes detection. Hermione's transformation goes wrong, leaving her in the hospital wing with cat-like features. The chapter reveals crucial information and the risks involved in their investigation.

Chapter 13: The Very Secret Diary

Harry finds an old diary belonging to Tom Riddle, a former Hogwarts student. The diary appears blank, but when Harry writes in it, Riddle's memory emerges, showing him a scene from fifty years ago. In the memory, Riddle accuses Hagrid of opening the Chamber of Secrets and unleashing a monster. Harry is shocked but unsure if he can trust the diary. The mystery deepens as he grapples with the revelation and what it means for Hagrid and the current attacks. The chapter adds layers to the unfolding mystery and introduces a key piece of the puzzle.

Chapter 14: Cornelius Fudge

Hagrid is taken to Azkaban by Cornelius Fudge, the Minister of Magic, after another student, Hermione, is petrified. Dumbledore is removed from his position as headmaster. Before being taken away, Hagrid cryptically advises Harry and Ron to "follow the spiders" for answers. The school is in chaos, and fear grips the students and staff. Determined to uncover the truth, Harry and Ron venture into the Forbidden Forest, where they encounter Aragog, a giant spider who reveals that Hagrid is innocent and that the real monster in the Chamber of Secrets is something the spiders fear greatly.

Chapter 15: Aragog

Following Hagrid's clue, Harry and Ron venture into the Forbidden Forest to find Aragog, Hagrid's giant spider. Aragog explains that he is not the creature from the Chamber of Secrets and that the monster is something even spiders fear. Aragog reveals that a girl died when the chamber was last opened and that Hagrid was wrongfully accused. Despite the terrifying encounter with Aragog's offspring, Harry and Ron manage to escape. They now know that Hagrid is innocent, but they still don't know who is behind the current attacks. The chapter adds to the suspense and danger of their investigation.