1) In what year was serfdom abolished? a) 1861 b) 1882 c) 1753 d) 1902 2) The United States bought Alaska from which country? a) Russia b) Kazakhstan c) Germany d) Belarus 3) In what year Einstein was born? a) 1879 b) 1889 c) 1891 d) 1905 4) Which planet is the warmest? a) Earth b) Sun c) Venus d) Jupiter

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