阅读下面材料，根据其内容和所给段落开头语续写两段，使之构成一篇完整的短文。Itwasthedayofthebigcross-countryrun.Studentsfromsevendifferentprimaryschoolsinandaroundthesmalltownwerewarmingupandwalkingtheroute(路线)throughthickevergreenforest.IlookedaroundandfinallyspottedDavid,whowasstandingbyhimselfofftothesidebyafence.Hewassmallfortenyearsold.Hisusualbigtoothysmilewasabsenttoday.Iwalkedoverandask...
