Q18: GWD-4-4
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. as
B. than
C. that
D. of what
E. at which
给的答案是选C, 怎么也看不明白,请给位给点拨一下,谢谢~~~~ |