单选题 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?

【正确答案】 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)。