阅读理解。 Do you enjoy wearing Levi's blue jeans? Blue jeans have become popular all over the world, but do you know how they got started? Levi Strauss was born in Germany in the mid-1800's and immigrated (移居) to the Unit ed States as a  young man.  He lived in New York City and learned the drygoods business for several years. In 1853 he took his knowledge and his dreams to San Francisco (California, USA). His dream to succeed came true over the next 20 years as he became a very successful businessman. Many of Levi Strauss' customers were cowboys and miners. They needed clothing that was strong and lasting. Strauss found a special cloth from France that was comfortable and lasted a long time. It was called 'serge and mines' which was later shortened to the word 'denim (粗棉布)'. Another man named Jacob Davis bought large amounts of the denim cloth from Levi Strauss. He was a tailor who made pants for hard-working men. One of his customers was continually tearing the pockets off his pants. So Jacob Davis decided to put rivets (铆钉) on certain parts of the pants to make them stronger.  The customer loved the new pants so much that he told all his friends, and soon. Jacob Davis was busy making lots of pants with rivets. Jacob Davis soon realized that using rivets was a great business idea, and he didn't want anybody to steal that idea.  He'decided that he would need to get a patent.  But being a poor tailor, he didn't have  money to pay for the patent. After thinking it over, he went to the businessman Levi Strauss and told him   his idea.  He said, 'If you agree to pay for the patent, we will share the profits from the riveted pants.  ' Levi Strauss did agree, and the new riveted pant business was called Levi Strauss and Company. Today  Levi's jeans are more popular than ever, and Levi's name continues to live in. 1. What is Levi Strauss? A. A  tailor. B. A  miner. C. A  cowboy D. A  businessman. 2. What do you think the underlined word 'patent' means? A. 办法 B. 利益 C. 专利 D. 公司 3. Jacob Davis thinks . A.  he must get the help of Levi Strauss B. his idea is good and he can do it easily C. Levi Strauss can't share his profits D. all the persons all over the world like the jeans very much 4. Which is right according to the passage? A. Jacob Davis sewed pants in his business. B. Levi Strauss didn't want to pay for Jacob Davis' patent. C. Levi Strauss and Jacob Davis became business partners. D. Jacob Davis put rivets in pants because they looked good, 5. What is the writer's main idea? A. How were the jeans invented? B. How does Levi Strauss succeed? C. Jacob Davis was a clever mam D. How to earn more money?