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
作者: michelleho 时间: 2009-4-1 01:50
The GWD answer is D, but I thought should be C. "three times the price that A charges for B 作者: songlovegt 时间: 2009-4-1 02:23
You are right. The answer was confirmed by the PREP of Alienx edition. The question number is prep1-238.