阅读理解。 Mark Twain, the famous American writer and a great master of humor,liked to play jokes on others. But once a joke was played on him. One day Mark Twain was invited to give a talk in a small town. At lunch he met a young man,one of his friends. The young man said that he had an uncle with him. He told Mark Twain that his uncle never laughed or smiled, and that nobody and nothing was able to make his uncle smile or laugh. 'You bring your uncle to my talk this evening,' said Mark Twain. 'I'm sure I can make him laugh. ' That evening the young man and his uncle sat in the front. Mark Twain began to speak. He told several funny stories and made everyone in the room laugh. But the man never even smiled. Mark Twain told more funny stories, but the old man still kept quiet. Mark Twain continued to tell his funny stories. Finally he stopped. He was tired and quite disappointed. Some days later,Mark Twain told another friend what had happened.' Oh,' said his friend, 'I know that man. He's been deaf for years. ' 1. The writer wrote the passage mainly to _____. A. tell readers Mark Twain liked playing jokes B. tell readers a joke played on Mark Twain C. tell readers Mark Twain was a great writer D. tell readers how to tell a funny story 2. One day Mark Twain met  _____  at lunch. A. a friend B. his brother C. his teacher D. a young girl 3.Why did Mark Twain ask the young man to bring his uncle to his talk? A. Because he thought he could make him laugh. B. Because he wanted to get to know the old man. C. Because the old man could tell stories. D. because he wanted to learn from the old man. 4. Mark Twain stopped finally because he was _____. A. disappointed B. sorry C. ill D. sleepy 5. Mark Twain couldn't make the old man laugh because ____ . A. his jokes were not funny B. the old man wasn't interested in the jokes C. the old man could tell more funny jokes D. the old man was deaf