Mark Twain seemed unhappy in his later years because his wife and______ had died.

填空题Mark Twain became the most outstanding writer of his time because he knew his people and the Mississippi River very well, and he inherited from his mother ______.

填空题When Mark Twain became a miner in the frontier region, he started to write.

填空题During 1876 and 1889, Mark Twain wrote______ books for which he is most famous.

填空题Mark Twain was not a successful______, but he was an outstanding writer.

填空题Mark Twain earned a large sum of money by collecting and selling cocoa.