After her uncle William IV died, Princess Victoria became Queen at the age of 18 in 1)____________. Her reign(1837-1901) was the 2)____________period in Britain——“The Empire on Which The Sun Never Sets” During her reign, British history was called "Victoria Era." Britain speeded its colonial 3)______________ and established and occupied many colonies within a certain range. Her decades of 4)______________and cultural prosperity in the United Kingdom and the full development of the constitutional monarchy have made Queen Victoria a symbol of 5)_____________ and prosperity in Britain.