Underline the sentences which do not relate to the controlling idea.(找出与中心意思无关的话) The discovery of America was an accident. It was the result of Europe’s desire for trade with China and India. In 1492, Christopher Columbus set out under the flag of Spain to find a direct sea route to the rich trading areas of the Far East. He hoped to find a shorter route to China and India. Many westerners from there carried plenty of treasures and silk and made their fortunes. So he sailed due west across the Atlantic. Instead, he found two huge continents that were until then unknown to Europe. They blocked his way to the Far East. These two continents were North America and South America.