Lastweek,ourclasswasondutyinthecafeteria(食堂)forstudents...
問題詳情：Lastweek,ourclasswasondutyinthecafeteria(食堂)forstudentself-management.Onthefirstday,Iwasshockedtoseesomuchleftoverfoodthrownawaybystudents.What 61 waste!Beingconcernedaboutit,myclassmatesa...