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 at which Q29:

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

请详细说明一下, thanks!

Q8我认为选that比较好，这里的that引导定语从句修饰前面的price.用as的话，应该是完整格式3 times as ....as...

Q29我选A，因为每个shade都只有1个roof,再加上后面的supported的用法，所以确定位A。