| 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
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! | 
