Directions: Write an English composition in 120-150 words according to the instructions given below in Chinese.
假如你是明启中学的高三学生李华，你的朋友Jack邀请你一同制定毕业后的暑假计划，请从他提供的计划清单中选择你所心仪的一个。给他写封邮件，内容需包含：
1.你的选择
2.你的理由及如何执行该计划

①参加山区支教志愿服务 ②去祖国各地走走 ③学习技能，如驾驶、乐器演奏、视频剪辑等

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