GWD13-Q8

dm_dh2002

请教

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.

 

1. as
2. than
3. that
4. of what
5. at which

为什么答案是D不是E呢??不是理解为 the drug's...product at price吗??

足球幽灵

句子意思要表达一个倍数关系，所有选项中只有D可以。three times the price of what....   what 相当于 price（具体的钱数） that...。what在从句中作了charge的宾语，同时又要作of的宾语。在所有关系代词中，只有what能这么用，同时作两种成分