单选题：In the 1950s that the American government finally took actio

题目内容：

In the 1950s that the American government finally took action to build a national highway system. A．Right
B．Wrong
C．Not mentioned

参考答案：

答案解析：

回答题。Highways

回答题。Highways The increase in auto production, private turnpike (收费公路) companies

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