Answer:
1. "I think he killed a man"
2: "an Oxford Man"
3: "I felt a haunting loneliness sometimes"
belong together.
4: "I was in the Seventh Infantry" does not belong.
Explanation:
1, 2 and 3 belong together because the sentences tend to fit into each other. In a sentence 1, he talks about killing a man and in sentence 2, he talks about the man that was killed, an Oxford Man and then he talks about the loneliness that haunts sometimes which may likely connect to the murder.
But sentence 4 doesn't belong because it doesn't fit into the others. He is referring to a place, the Seventh Infantry.
So, the above answer is correct.
