2. 外语
  3. National standards for paved roads were in place by 1921. It was in the 1950s that the American government finally took action

National standards for paved roads were in place by 1921. It was in the 1950s that the American government finally took action

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问题 National standards for paved roads were in place by 1921.
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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大学英语四级

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