885-最新真题1-5，不理解，请大虾指教。

无心

5.     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（A）

(E) with roofs of poles and arrowweed that are

看不明白A的arrowweed和谁平行。

upychhill

应该是：each{ [a roof of （poles and arrowweed）]supported by ...}

leo1111

arrowweed应该是arrowwood的复数形式。和poles平行

无心

我倒，难怪如此，我看了半天没算懂，以为ETS又有什么新玩意。

谢谢楼上两位兄弟回复。