prep1还是 不明白

1. 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

选 b我能理解，中间是插入语

能不能帮我看看d错在哪里？with each 和of两部分并列修饰　scale...阿。。。

讨论过,贴个链接先参考,有不懂再问

http://forum.chasedream.com/dispbbs.asp?BoardID=23&replyID=2170782&id=231385&skin=0

我看过了的，没有明白。。。

我知道b为什么对但是不知道d错在哪里了？？

谢谢斑斑！～

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

其中of up to 600roms 到底是修饰75 carefully engineered structures呢 还是修饰each structures,似乎更是修饰前者,这样的话,意思就不对了

另外each connected by...改变了原句的意思,是75 structures都被一条路连接,而不是每一个都被连接,仔细体会一下吧

恩，同意绿洲版主的解释，让我豁然开朗。

至于CDE，能否这么理解：第二个of去掉逗号以后修饰structures有限定的含义，变成意思为“每个都有600个房间的建筑物”破坏了原句的意思。而且CE后面都用了过去完成时，不妥。

？？？请NN指正

竟然开朗了。。。

我还是不明白，有人再解释一下吗？