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.
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.
IMO C 去掉插入语 A new hair-growing drug is being sold for three times the price that the drug’s maker charges for another product with the same active ingredient. that引导定从修饰price 这里并没有比较的意思,AB错。 charge 后面直接跟the price不加任何介词,所以DE错。D根本不是定从