Mark Twain（马克·吐温）, the famous American 1 and writer, liked to 2 others. But once a joke was played on him.
One day Mark Twain gave 3 in a small town. At lunch a young man told him that his uncle never laughed. 4 could make his uncle laugh.
Mark Twain asked the young man to take his uncle to his lecture that evening and said he could make him laugh.
That evening the young man and his uncle sat in the first 5 . Mark Twain told some 6 stories. Everyone there laughed, but the old man never even smiled. Mark Twain told the funniest stories, but the old man did not laugh, either. 7 , he stopped. He was very 8 .
Some days later, Mark Twain told a friend of his 9 this story. His friend laughed and said that he knew that old man. He was 10 .
