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  3. On vacations, people can take a trip to every comer of America except great sections of desert. The oldest forms of transportat

On vacations, people can take a trip to every comer of America except great sections of desert. The oldest forms of transportat

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问题 On vacations, people can take a trip to every comer of America except great sections of desert.
The oldest forms of transportation in America are still in use, and especially boats on America’s rivers and
选项
答案Great Lakes
解析 由题干关键词oldest forms of transportation定位到文章的倒数第二段。其中第二句中提到All of these are still used，and especially boats on America’s rivers and Great Lakes，这里的all of these指代第一句中的oldest forms of transportation。
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大学英语四级

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