The author of "Harlem Night Sing", Langston Hughes, enjoys music. The Jazz and blues music played by the bands influences his poem. In this poem there is a couple. They are walking together, enjoying the music and the beautiful night in Harlem. It is as if they were making music together.
The correct answer would be an almanac.
Someone accidentally left B. His or her back back on that park bench. You are referring to a person.
Vonnegut was considered a success as a writer in 1960s.