请教两道语法题目？

luckieone

1。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

Q8:

A new hair-growing drug is being sold for three times the price, per milligram, as the drug’s maker charges for another product with the same active ingredient.

as

than

that

of what   E.at which

请详细说明一下。 非常感谢！

gre3333

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sunaoneverchang

发错了

这里是托福

转道GMAT 版了