汤姆因在学校使用手机被学校处分，他感到很困惑，写信给你求助。请根据以下结构提示给汤姆回信。开头结尾已给出。
Beginning: Your letter reached me yesterday. It said in your letter that…….
Paragraph 1: 手机的优点：联系便捷
Paragraph 2: 带手机上学存在的问题：干扰教学，有害学习和健康
Ending: It is right for school to prevent you from using cell phones in school.
Your letter reached me yesterday. It said in your letter that you were punished for using cell phones, which puzzled you.
网友回答
(答案→)Your letter reached me yesterday. It said in your letter that you were punished for using cell phones, which puzzled you.
解析：提纲作文要求考生根据所给的写作要求和提纲，确定文章的中心思想，然后紧紧围绕中心思想展开写作。要求考生在保证内容要点全部概括的基础上可以充分发挥自己的想象，进而用自己的语言来表达某种观点或看法，增添了写作的灵活性，同时能较好地考查考生的想象能力和英语语言表达能力。