Most likely passage for the test:
That moment she was mine, mine, fair,
Perfectly pure and good: I found
A thing to do, and all her hair
In one long yellow string I wound
Three times her little throat around,
And strangled her. No pain felt she;
I am quite sure she felt no pain.
Context: Robert Browning enters the head of a deranged man who murders his lover, Porphyria. She comes to him at night, through a storm, but as he finds he really has her love, he decides he wants to keep her with him forever. So he strangles her with her own hair. And since it's what she really wants -- to be with him, he is allowing her to be with him forever... as he sees it. He did something good because she wanted it, and she did not feel any pain during her death, and finally, God seeminly condones his behavior as well through lack of rebuke.