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
答案选C,但是这是个非限制定语从句,that可以用在这里吗?谢谢-- by 会员 kenhu (2010/7/12 18:45:12)