Thecostofsalesmakesupalargepartofthepricesthat_____.
A.are paid for all productsB.all products are paidC.for which all products are paidD.for all products paid在线课程A
本题考查的是定语从句，that是引导定语从句的关系代词，指代the prices，在从句中充当被动语态的主语，故C是结构错，D是语态错，pay的搭配是pay the price for，因此for不可省，故B也错。