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.
我选E,没有charge of somethings for sth
只有charge XX for sth
我想可以使charge for sth at the price of ..
你理解错了应该是the price of what
不是charge of,因为比较的是价格。eg:
1/6 times of the asking price
那更不对了
如果是price of what
what应该指代标价的东西
从句明显是charge的
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