单项选择题
A．They arranged for his hunting accident. B．They thought he was crazy. C．They decided to help him. D．They asked him to teach them to read and writ
A．is essential to the well-being of society as a whole B．can provide the solution to many of our social problems today C．can protect our environment from being polluted by industry D．can provide us with more natural resources for industrialization
A．To describe some successful doctors B．To compare poor writers with diseased people C．To tell the teachers why some students are poor in health D．To show the importance of a teacher’s job