书面表达。
请根据以下提示,用英语写一篇短文。
Yesterday is history, tomorrow is a mystery, but today is a gift. That is why it is called the present.
注意:
①无须写标题,不得照抄英语提示语;
②除诗歌外,文体不限;
③文中不得透露个人姓名和学校名称;
④词数为120左右。
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