第1题: [单项选择]In moral matters, parents should ______. A. observe the rules themselves B. be aware of the marked difference between adults and children C. forbid things which have no foundation in morality D. consistently ensure the security of their children 参考答案:A 答案解析:[解析] 依据文章第三段第四句If they are not sincere and do not practise what they preach,their children may grow