GWD 10-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.

A.      each a roof of poles and arrowweed

B.      each a roof of poles and arrowweed that are being

C.      with each being a roof of poles and arrowweed

D.      with roofs of poles and arrowweed to be

E.       with roofs of poles and arrowweed that are

这道题目答案是A，我选了E。刚刚看了之前也有讨论贴，但还不是很清楚，想请教各位NN，为本人指点一下吧。

主语是Mojave，a是独立主格，解释shades

e是伴随状语修饰主语，逻辑上错了

1 句首出现all，句尾出现each，是正确答案标志之一

2 with 的逻辑主语不对

3 E后半句定从有点啰嗦

首先，我想说E并没有逻辑上的修饰错误，除了三大特例意外（同位，a of b, doing）其余的修饰结构永远紧贴最近的名词。这里的with roofs就是指shades
 
但是这道题E的选项改变原句意思了。A原句说shade就是 a roof of poles and arroweed

E却在说每一个shade有一个roof. 老外也搞不清shades是什么，在这种情况下，最好不要改变句义。