Dear Jack，

I am sorry to hear that you quarrelled with your parents about playing mobile phone games.

You spent so much time playing games that you forgot when to sleep and you felt too sleepy and tired to listen to the teachers in class the next day. Because of these, you became poor in your study. Your mother got angry with you. You felt bad about this.

Firstly, I think you should stop playing games. You can use mobile phone to search for information, and look up new words. it is a useful tool in your study.

Secondly, you need to communicate with your parents and teachers, and let them know your problems. They will help you. at the same time ,they will forgive you for your mistakes.

I hope my suggestions are of great value to you.

Yours，

Tina

本题是写一篇给定材料的书信，写作的话题为如何合理地使用手机，具体内容包括学生使用手机所存在的一系列的问题，与父母争吵，对此提出个人的观点和建议，提出使用手机的好处，如查阅资料，记单词；同时要理解父母、老师的心情，要主动去沟通，得到他们的原谅和帮助。在写作时应注意书信的格式，同时应注意写作的内容要符合题意，要注重语言的准确性和连贯性。