Throughout their history, Americans have been people on the move. The early immigrants had to travel to get to the new world. Once they arrived, they settled along the east coast. But they weren’t content to stay there. Explorers and traders journeyed to the unknown western territories. Later, settlers moved west to develop these new areas. As a result of this westward migration, Americans eventually occupied the whole continent—from the Atlantic to the Pacific. Even today, Americans seem unable to stay in one place. Research says that the average American moves every five years.Besides their habit of changing addresses, Americans are used to traveling. Some people make long-distance commutes(乘车上下班) to work daily. Their jobs may even require them to take frequent business trips. Most companies provide an annual vacation for their employees, and people often use that time to travel. Some people just visit friends or relatives in distant states. Others go on low budget weekend excursions(短程旅行) and stay in etels. Those with more expensive tastes choose luxurious resorts and hotels. Camping out in the great outdoors appeals to adventurous types. Some travel in recreational vehicles (RVs) to camp out in comfort, while others “rough it” by sleeping in tents.Most Americans prefer to travel within their nation’s borders. Why? For one thing, it’s cheaper than traveling abroad, and there’s no language problem. But besides that, the vast American territory offers numerous tourist attractions. Nature lovers can enjoy beaches, mountains, canyons, lakes and a wealth of natural wonders. Major cities offer visitors a multitude of urban delights. The convenience of modern freeways, railways and airplanes makes travel in America as easy as pie.Many American vacations are as unique as the people who take them. Families often plan their trips with the kids in mind. More and more “family friendly” vacation resorts offer special programs for children. History buffs(爱好者) seek out famous historical sites and museums. Environmentalists prefer “green vacations”. These trips allow them to observe flora and fauna(动植物群) up-close without disturbing the sensitive balance of nature. Some people find sea sails relaxing and refreshing. Others hit the water to go fishing, skiing or whitewater rafting. Daring souls get the thrill of a lifetime on trekking expeditions and safaris(旅行) in remote places from Africa to Asia. 1. What’s the best title for this passage?A.mericans’ ImmigrationB.Americans’ TravelC.Americans’ VacationD.Americans’ Address 2. What does the underlined word “luxurious” in the second paragraph mean?E.Containing cheap but comfortable things.F.Containing distant but fascinating things.G.Containing miserable but thoughtful things.H.Containing expensive and enjoyable things. 3. How many reasons are there for the fact that Americans prefer to travel along in their own country?I.5.J.7.K.9.L.11. 4. In “green vacations”, visitors can see ________.M.lakes and riversN.plants and animalsO.mountains and bordersP.fishing and skiing 5. From the passage, we can infer that ________.Q.all the Americans like traveling betterR.half of the Americans have trips at homeS.no one can take rafting in the Asia and AfricaT.brave Americans enjoy long journey to the foreign countries