1. From Charlotte Bronte’s Jane Eyre.
2. The speaker is Jane Eyre and she is speaking to Mr. Rochester.
3. Jane is trying to show Mr. Rochester that she must leave him because she doesn’t want to become his accessory. She feels hurt because Mr. Rochester has not told her about his wife and in her mind he doesn’t treat her as an equal being.

答案
By dramatic monologue it is meant that a poet chooses a dramatic moment or a crisis, in which his characters are made to talk about their lives, and about their minds and hearts. In “listening” to those one-sided talks, readers can form their own opinions and judgments about the speaker's personality and about what has really happened. Robert Browning brought this poetic form to its maturity and perfection and his “My Last Duchess” is one of the best-known dramatic monologues.