学校组织我们参加民防教育活动,为了能准确地知道集合时间,前一天晚上,我让妈妈把我那块心爱的手表拿出来。妈妈见我要戴手表参加活动,脸上顿时浮现出不信任的表情:“你要戴手表?不要到时候给弄丢了,这可是你十岁生日时哥哥送你的生日礼物呀!”“我知道。”我不以为然地回答道。第二天,我兴高采烈地戴着那块心爱的手表去参加活动了。在活动中我还不忘向同学们介绍我那块手表的来历。可是,就在活动即将结束时,我发现手表真的不见了。我把书包翻了个底朝天,也不见手 School organized our participation in civil defense education activities, in order to accurately know the collection time, the night before, I let my mother put my beloved watch out. See my mother to wear a watch to participate in activities, his face suddenly showed an expression of distrust: “Do you want to wear a watch? Do not lose time, this is your birthday gift when your tenth birthday ah! ”“ I know. ”I replied displeasingly. The next day, I happily wearing that beloved watch to participate in activities. At the event I did not forget to introduce the origin of my watch to my classmates. However, just before the end of the event, I found the watch really gone. I turned the bag upside down, nor saw his hand