Read the text and fill in the gaps.
Mark Twain really is one of the most incredible and influential ... in American literature, and his influence is still very much palpable in writing today.
Called by many "The Father of American Literature," Mark Twain was born Samuel Langhorne Clemens on November 30, 1835, in Missouri.
When Samuel was 12, his father died of ... . At the age of 15, he got a job working for his brother Orion's newspaper, The Hannibal Western Union."
Mark Twain became a cub pilot on a ... on the Mississippi River. He later became a full-fledged pilot, and he thought it was the best time of his life. But in 1861, when the ... broke out, the steamboat trade absolutely came to an end; and he was out of a job.
Twain very briefly served in the ... . That did not work out, so he then headed West with his brother. He eventually made his way to San Francisco and really began his career again as a ... .