Lastweek,ourclasswas 41 dutyinthecafeteriaforstudentse...
問題詳情：Lastweek,ourclasswas 41 dutyinthecafeteriaforstudentself-management.Onthefirstday,I 42 (shock)toseesomuchleftoverfoodthrownawaybystudents.Whatawaste!Beingconcernedaboutit,myclassmate...