新题15中的第5题

freshplayboy

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.D
(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
请问这题EACH后面的句子是不是修饰前面的DWELLINGS?还有他的结构我怎么看不出来呢？

linlin315

http://forum.chasedream.com/dispbbs.asp?boardID=23&ID=27200这里面有

freshplayboy

谢谢美女