根据短文内容，从短文后的选项中，选出能填入空白处的最佳选项．选项中有两项为多余选项．
（71）    People traveled in search of food and shelter or in order to flee from their enemies．Sometimes they were looking for gold or silver in order to become rich．On other occasions they were searching for rich farmland．
This is not to say that no one ever traveled just for fun．Even in ancient times，some pleasure travel occurred．During a typical season，700，000 tourists would crowd into the ancient city of Rome，where animals performed and magicians entertained them．（72）    
（73）     International tourist arrivals alone reached as many as 546 million in 1994 and are forecast to rise to 937 million in 2010，according to the World Trade Organization．
（74）    Probably the most common reason for traveling is related to our physical well-being．Actually，traveling to sports events is one of the fastest growing types of travel．In our fast developing society where stress has become part of people's life，people can rest and relax by having a change of environment and activities．
（75）     No one seems to doubt that travel broadens the mind．In 18 th century Europe，young men would go on a Grand Tour to various countries in order to complete their education．Today the desire to travel to different countries is encouraged by modern mass media．People who travel to other countries can at the same time learn more about their own country and culture．

A．But why do people like traveling so much？
B．Throughout history，most travel was not for pleasure．
C．So they travel to a lake for a swim or to a park for a hike．
D．The improvement in transportation has also encouraged people to travel．
E．People had appeal to their lives in the past．
F．The growth of tourism has become a modern phenomenon experienced by all countries in the world．
G．Another important reason for traveling is to satisfy our curiosity about different places and cultures．

【考点】综合填空,社会文化类阅读

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