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.
- each a roof of poles and arrowweed
- each a roof of poles and arrowweed that are being
- with each being a roof of poles and arrowweed
- with roofs of poles and arrowweed to be
- with roofs of poles and arrowweed that are
答案是A,我选了E,可能理解有误,正确答案是什么含义啊? |