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题库 / Prep2008E2-SC-186
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
and extended 破坏了修饰结构，无主语
在E中 “The greatest road system built in the Americas prior to the arrival of Christopher Columbus was the Incan highway” 是不是 “ the Incan highway” 的同位语？
extend 是背景，is 2,500 miles long 是图形。
选项A，which引导的定语从句缺少谓语动词
选项B，extended变得与前面分句谓语was并列，
理解extended和extending的意思差别