单项选择题The word motherland is a(n)
单项选择题Speech ______ refers to any distinguishable form of speech used by a speaker.
单项选择题The novel Gulliver’s Travels was written by
单项选择题Who is described by Mark Twain as a boy with a sound heart and a deformed conscience
单项选择题______ forms a natural boundary between Mexico and the United States.