72. F 联系空前的一句If he wants to have a toy, give him the money and let him hand the money to the cashier.可知F项合适。
73. D 联系空后的两个假设，我们知道，应该告诉孩子为什么他能或者不能获得某一东西。
74. A 联系后面的You can show your child how to make choices between different brands of a product so that you can save money.因此这部分教会“你”的孩子如何做出明智的决定。
75. C 联系空后的If he chooses the cheaper brand, allow him to make another purchase with the money saved.可知，作者认为“我们”要允许孩子做出选择。
