单项选择题The leading ______ state in the United States is Wisconsin.
单项选择题______ has become the world's largest exporter of fish.
单项选择题Which of the following does NOT belong to the Indo-European family
单项选择题Wordsworth's poetry, divided by the subjects, falls into two major groups: one about ______ and the other about ______.
单项选择题The background of ______, a novel by Charles Dickens, is set in the French Revolution.