Prep1-57

Prep 1-57

The Anasazi settlements at Chaco Canyon were built on a spectacular scale with more than 75 carefully engineered structures, of up to 600 rooms each, were connected by a complex regional system of roads.

(A) with more than 75 carefully engineered structures, of up to 600 rooms each, were

(B) with more than 75 carefully engineered structures, of up to 600 rooms each,

(C) of more than 75 carefully engineered structures of up to 600 rooms, each that had been

(D) of more than 75 carefully engineered structures of up to 600 rooms and with each

(E) of more than 75 carefully engineered structures of up to 600 rooms each had been

答案：B。请问下这道题B选项替换原文错误句子后，逗号后面的connected by a complex regional system of roads是修饰engineered structures的吗？请nn多多指教！

对头，

A  were bulit on a spectacular scale with  structures, connected by....

A建在一个惊人的规模上，这个规模有由××相连的结构.

谢谢飞鹰的指教。

偶发现定语从句或者分词短语（也可以看作省略后的定语从句）经常跳过介词短语或者插入语（这道题一次跳过了两个）去修饰前面的那个名词。