GWD 01-SC 问题

katherine8110

下面是一道GWD的SC题，正确答案是A，但是我始终想不明白，请高人指点！！！

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.

1. each a roof of poles and arrowweed
2. each a roof of poles and arrowweed that are being
3. with each being a roof of poles and arrowweed
4. with roofs of poles and arrowweed to be
5. with roofs of poles and arrowweed that are

万分感激！！！

georgeqian

each型独立主格,强调句尾名词,形式为:

   句子 + 复数名词结尾, each + 介词短语/形容词短语/-ed形式/-ing形式。

   例:Chinese, the most ancient of living writing systems, consists of tens of thousands of ideographic characters, each character a miniature calligraphic composition inside its own square frame. 独立主格形式 n + n 与主句形成松散逻辑关系

katherine8110

thanks a lot!!!