[填空题]Highways 　　Early in the 20th century, most of the streets and roads in the U.S. were made of dirt, bricks, and cedar wood blocks. Built for horse, carriage, and foot traffic, they were usually poorly cared for and too narrow to accommodate (容纳) automobiles. 　　With the increase in auto production, private turnpike (收费公路) companies under local authorities began to spring up, and by 1921 there were 387,000 miles of paved roads. Many were built using specifications of 19th century Scottish engineers Thomas Telford and John MacAdam (for whom the macadam surface is named), whose specifications stressed the importance of adequate drainage. Beyond that, there were no national standards for size, weight restrictions, or commercial signs. During World War I, roads throughout the country were nearly destroyed by the weight of trucks. When General Eisenhower returned from Germany in 1919, after serving in the U.S.Army’s first transcontinental motor convoy (车队), he noted, “The old convoy had sta

[单项选择] Highways Early in the 20th century, most of the streets and roads in the U. S. were made of dirt, brick, and cedar wood blocks. Built for horse, carriage, and foot traffic, they were usually poorly cared for and too narrow to accommodate(容纳) automobiles. With the increase in auto production, private turnpike(收费公路)companies, under local authorities began to spring up, and by 1921 there were 387,000 miles of paved roads. Many were built using specifications of 19’’ century Scottish engineers Thomas Telford and John Mac Adam (for whom the macadam surface is named) , whose specifications stressed the importance of adequate drainage. Beyond that, there were no national standards for size, weight restrictions, or commercial signs. During World War I, roads throughout the country were nearly destroyed by the weight of trucks. When General Eisenhower returned from Germany in 1919, after serving in the U. S. Army’’s first transcontinental mo
A. Y
B. N
C. NG

[填空题]Highways 　　Early in the 20th century, most of the streets and roads in the U.S. were made of dirt, bricks, and cedar wood blocks. Built for horse, carriage, and foot traffic, they were usually poorly cared for and too narrow to accommodate (容纳) automobiles. 　　With the increase in auto production, private turnpike (收费公路) companies under local authorities began to spring up, and by 1921 there were 387,000 miles of paved roads. Many were built using specifications of 19th century Scottish engineers Thomas Telford and John MacAdam (for whom the macadam surface is named), whose specifications stressed the importance of adequate drainage. Beyond that, there were no national standards for size, weight restrictions, or commercial signs. During World War I, roads throughout the country were nearly destroyed by the weight of trucks. When General Eisenhower returned from Germany in 1919, after serving in the U.S.Army’s first transcontinental motor convoy (车队), he noted, “The old convoy had sta