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
我觉得b 的表术更清晰些,不会造成supported修饰谁的模糊,但是答案选的是a... |