The greatest road system built in the Americas prior to the arrival of Christopher Columbus was the Incan highway, which, over 2,500 miles long and extending from northern Ecuador through Peru to southern Chile.
Columbus was the Incan highway, which, over 2,500 miles long and extending
Columbus was the Incan highway, over 2,500 miles in length, and extended
Columbus, the Incan highway, which was over 2,500 miles in length and extended
Columbus, the Incan highway, being over 2,500 miles in length, was extended
Columbus, the Incan highway was over 2,500 miles long, extending
这道题最开始做的时候 完全是 主观臆断的排除了cde...只留下了ab ...
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