Not only has the highway system affected the American economy by providing shipping routes,it has led to the growth of spin-off industries like service stations ,motels,restaurants,and shopping centres.It has allower the rwlocation of manufacturing plants and other industries from urban areas to rural.

　　By the end of the century there was an immense network of paved roads ,residential streets,expressways,and freeways built to support millions of vehicles,The high way system was officially renamed for Eisenhower to honor his vison and leadership.The year construction began he said:"Together,the united forces of our communication and transportation systems are dynamic elements in the very name we bear -United States.Without them ,we would be a mere alliance of many sepaeate parts."

　　8.The greatest benefit brought about by the interstate system was___________

　　9.Trucks using the interstate highways deliver more than__________________

　　10.The interterstate systerm was renamed afterEisenhower in recognition_____________

　　参考答案：1.Y N NG 2. Y N NG 3.Y NO NG 5. Y N NG 6.Y N NG 7.Y N NG

　　参考答案：08. personal freedom of mobility

　　参考答案：09. 75 percent

　　参考答案：10. his vision and leadership