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

Answer: d

好生纳闷阿 the price at which 多好啊 of what what 指代什么啊

我也觉得E才是正确答案。

of what看不明白。