马上考试了，一道GWD仍耿耿于怀。。。

这道题我做了3次，3次都选错，直到现在我仍然认为前辈们给的答案有点说不通

还有两天上考场了，还是觉得这一题不搞清楚不安心，希望NN指教！

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

答案是A，我选了E

因为我觉得如果选A的话，虽然从语法的角度讲是对的，但是它岂不是把shades(也就是dwellings）跟 roof并列了吗？ 意思就变成了

“他们住在被称之为shades的四面敞开的平顶房子里，每个房子都是一个由柱子支撑的剑木屋顶”

但事实应该是“。。。。每个房子都有一个。。。。。屋顶”啊？！