如何杀此题?

shayuamerica

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

   Answer: A

never3738

with修饰有歧义；that are being错。 SO A正确。