Using the word bank, choose the correct form of a Word to Know to complete each sentence.
My family came from a town near St. Petersburg a long time ago, and our ___1.___ is mainly Russian. My great-grandparents did not feel welcome in Russian society after the revolution in 1917, so they immigrated to the United States. Members of their generation faced many difficult challenges when they arrived in America. They had to find jobs and learn to live by very different societal rules.