2. 职称英语
  3. National standards for paved roads were in place by 1921. [br] It was in the 195

National standards for paved roads were in place by 1921. [br] It was in the 195

游客2023-08-03  56
问题 National standards for paved roads were in place by 1921. [br] It was in the 1950s that the American government finally took action to build a national highway system.
选项 A、Y
B、N
C、NG
答案 A
解析 见第四段开头:The interstate highway system was finally launched in 1956....
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