GWD4-4

canny9832

顶楼上，明明是C。。。

caoqin1981

that前面那个逗号，是双逗号的后一个，是合理的。 同意，D中WHAT指代不清啊

ssyy23

the price that .......定语从句

jjielvv

我最初选的d 后来看大家在争论 很多人支持c  就觉得C了（没原则。。。）

今天我又做到了  还是觉得D！还请教了老师  应该是D

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.

如果将as换成that  就是修饰前面的the price    
即为  A new hair-growing drug is being sold for three times the price, per milligram, that the drug’s maker charges for another product with the same active ingredient.

很奇怪啊  后面是charge for another product 怎么能是前面的Price  

如果将as换成of what
即为A new hair-growing drug is being sold for three times the price, per milligram, of what the drug’s maker charges for another product with the same active ingredient.
就是three times the price of what(=the price) the drug's maker charges for another product
有人会指出  the price of the price 重复啊 不对啊
但是要看到两个price不同啊

一种新的生发剂三倍于另一种产品的价格出售  两个价格是不同的

Open to discussion

huan8438

你们看看mahattan是怎么解释的 这题貌似ENGLISH SPEAKER 也很confused。 the staff Ron answered :
this one isn't that bad if you get down to the "skeleton" of the sentence. to do that, you should kill intervening prepositional phrases that don't affect the grammar of the main sentence.
to this end, you can simply get rid of the following:
"per milligram"
"for another product"
"with the same active ingredient"
and you're left with:
a new drug is being sold for three times the price ____ the drug's maker charges.
once you see this, it should be more clear that (c) is the correct answer. if you're a non-native speaker and you can't recognize "that" as the word belonging in that blank, then here's the reason: it's because "price" is the direct object of "charges". when you turn around such constructions, you use "that":
i hit the ball --> the ball that i hit
she delivered the baby --> the baby that she delivered
etc.