【正确答案】 A

【答案解析】[解析] 16-18
Mark Twain, the famous American writer, liked to play jokes on others. But once a joke was played on him.
One day Mark Twain was invited to give a lecture in a small town. At lunch he met a young man he knew who told him that he had an uncle who never laughed or smiled. The young man told Twain that nobody and nothing could possibly make his uncle smile or laugh.
"You bring your uncle to my lecture tonight. " said Mark Twain. "I"m sure I can make him laugh. "
That evening the young man and his uncle sat in the first row. Mark Twain spoke directly to the old man. He told some rather funnny stories, which made everyone in the hall laugh. But the old man never even smiled. Mark Twain told the funniest stories he knew. But the old man"s face was still a blank. At last Mark Twain stopped. He felt very tired and discouraged.
Some days later, Mark Twain told a friend of his about what had happened.
"Oh," said his friend, "I know that old man. He has been deaf for years. "
16. Why did Mark Twain ask the young man to bring his uncle to the lecture?

【正确答案】 D

【答案解析】[解析]
How did Mark Twain feel at the end of the lecture?

【正确答案】 B

【答案解析】[解析]
What did Twain learn about the old man some days later?