15. The careless patientmistooka white buttonfora pill so the doctors operated on him immediately to take it outas soon aspossible . 那个粗心的病人把一颗白色的纽扣误认为 一粒药,因此医生立刻为他动手术,尽可能快地将其取出。 16. If foodsuppliesthe energytochildren, knowledgeprovidesthe chanceforth...