单项选择题
A．could B．can C．would D．will
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．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