DearXXX,

　　Howareyoudoing?

　　Thesummerholidayiscoming.Iwanttodosometinginterestingduringtheholiday.Iwillgetupearlyeverydayanddosomeexerciseafterhavingbreakfast.Theniwillhelpmymotherdosomehousework.Intheafternoon,iwilldomyhomeworksothatIcanfinishitontime.Intheevening,iwillwatchTVforalittlewhileandgotobadearlytokeepfit.

　　Ihopeyoucanhaveagoodsummerholiday.

　　YoursXXX

　　暑假来了.我想在暑假做一些有趣的事.我将会很早起床,在早饭之后做些运动,然后我会帮妈妈做一些家务.中午我会做作业,这样我就能及时完成暑假作业了.晚上我会看一会儿电视,然后早睡觉,保持健康的体格.

　　署名什么的你自己加吧