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.

问答题当今世界上，有越来越多的人对体育运动感兴趣； 2．但有些人仍然不了解运动的重要性； 3．体育运动有很高的价值。

填空题His jokes often led to violence when he was a boy.

填空题Mark Twain was born during the period of the Industrial Revolution.

单项选择题What lesson has Reebok learned from Nike's distribution problems