GWD 13-8求助

michelleho

    

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

michelleho

The GWD answer is D,
but I thought should be C.
"three times the price that A charges for B

songlovegt

You are right. The answer was confirmed by the PREP of Alienx edition. The question number is prep1-238.