Imagine a relay race． During this race， an athlete holds a stick as he runs a certain distance． Then he passes the stick to the next runner． That person runs faster， and then passes the stick to a third runner． Now imagine that the runners do not pass a stick． Instead they pass shiny silk， as well as gold， fruit， and glass． Imagine that the race does not move forward in just one direction． Instead the runners go back and forth along a road． They trade goods all along this route （路线） and at each end of it． Now imagine that the runners are businessmen． They lead caravans （商队） or lines of camels that carry things to sell． They travel on the ancient Silk Road to earn their living．
The Silk Road was a complex trade network． It passed through thousands of cities and towns． It stretched from eastern China， across central Asia and the Middle east， to the Mediterranean Sea． Businessmen traveled on the Silk Road from about 200 B．C． to about 1300 A．D.. Then sea travel began to offer new routes． Some people called the Silk Road the world's longest highway． However， the Silk Road included many routes--not just one smooth path． The routes ran through mountains and across deserts． They passed through an area that now includes 18 countries． The Silk Road had many dangers． These dangers ranged from hot sun and deep snow to thieves and wars． Only expert traders could survive．
The Silk Road got its name from its most prized goods． People used silk as money． They could pay taxes or buy goods with it． Traders carried more than just silk， though． They had gold， silver， and glass from Europe． People in the Middle East and Asia wanted these things． Businessmen also took horses from flat， grassy areas in central Asia and brought them to China and other areas． The horses changed the way people farmed and ran their armies． Indian businessmen traded salt and rare， beautiful stones． Chinese merchants traded medicine and china． They also traded paper， which quickly replaced animal skins in the west． Businessmen carried apples from central Asia to Rome． The Chinese had learned to combine different trees to create new kinds of fruit． They taught this science to others， such as the Romans． The Romans began to grow apples for food． The Silk Road led to worldwide commerce 2，000 years before the World Wide Web．
The people along the Silk Road did not share only goods． They also shared beliefs． Monks， priests， and other faith leaders taught their religions to others． The Silk Road created pathways for knowledge， diplomacy， and religion．



People turned to the sea for new routes after around 1300 A．D． because ______ ．

A. the Silk Road included many routes
B. the Silk Road passed through many areas
C. people traveled on the Silk Road for too long
D. there were more dangers along the Silk Road

Which of the following is closest to the meaning of the word prized in paragraph 3？ ______

A. appropriate
B. preserved
C. valuable
D. useful

Which of the following statements is WRONG？ ______

A. The Silk Road helped spread religions to more people．
B. The Silk Road gave people the idea to build highways．
C. Some people probably died while travelling．
D. Westerners probably used to write on animal skins．

In which column of a newspaper can we most probably read the article？ ______

A. Science．
B. Travel．
C. Sports．
D. Culture．