GWD1-Q3

Q3:

For protection from the summer sun, the Mojave lived in open-sided, flat-topped dwellings known as shades, each a roof of poles and arrowweed supported by posts set in a rectangle.

1. each a roof of poles and arrowweed
2. each a roof of poles and arrowweed that are being
3. with each being a roof of poles and arrowweed
4. with roofs of poles and arrowweed to be
5. with roofs of poles and arrowweed that are

答案给的是A, 我选的是E, each a在一起不重复吗？ 不太明白，那位阿牛可以帮忙解释一下。还有就是，这是我从下载专区下载的GWD31，刚才在语法区搜索了一下，发现大家讨论的GWD1和我做的不一样，请问为什么？谢谢！

A是典型的 each型独立主格结构，首选！

E的中心词为with roofs of poles and arrowweed ，不能表达原文的意思，

而且 that are定语从句修饰有歧义，是修饰roofs，还是poles and arrowweed?

GWD有多个版本，GWD31，TN24，还有携隐13套等等，31有大量重题，推荐用TN24套

多谢ls,可惜了，过于冲动，31套全给印了，扔了不心痛死我了。

谁可以给个TN24的链接？