Walt Whitman was a pioneering figure of American poetry. His innovation, first of all, lies in his use of ______, poetry without a fixed regular rhyme scheme.

单项选择题Among the great Middle English poets,Geoffrey Chaucer is known for his production of ______.

单项选择题The largest and smallest states of the United States are ______.

单项选择题In the author's opinion, as seen in this passage, one outcome of the influence of the life experience adherents has been ______.

单项选择题As the author sees it, one of the most important gains from the study of great literature is ______.

单项选择题According to the passage, the end goal of great literature is ______.