请教一到改错真题

海海

Anchorate  发布的最新真题中一道题, 感觉非常陌生, 不知道考点是什么:

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
E. with roofs of poles and arrowweed that are





参考答案C, 感觉是对的. 但考的时候不一定敢选. 请教一下语法方面的牛人.

halcyon

i prefer  A

海海

看错了, 参考答案是A.

each... 是同位语吗? 如果是的话, 前面的shades可是是复数啊. 还是有点困惑.