第30题: [单项选择]Woman: Does a half gallon of fresh milk still sell for $1.50 Man: Yes, but today if you buy two half-gallons, the second is only half price. Question: How much will the man pay for a gallon of fresh milk today A. $2.75. B. $2.25. C. $1.50. D. $3.00. 参考答案:B 答案解析:[解析] 女士问鲜牛奶还是不是半加仑1.50元,男士在肯定的基础上又补充说如果买两个半加仑,那么第二个半加仑可以算半价,实际上一加仑鲜牛奶只卖2.25元,即1.50+(1.50÷2)=2.25(元)。