【答案解析】
All the students,
It is found lately that the majority of students waste valuable resources. As is known to all, China is famous as an economical nation.
In the recent two weeks, large quantities of unused paper is found in the litter bin. What"s more, many students don"t eat up the food they bring to school. It is so wasteful that we must take measures to deal with it.
I appeal to everyone to form a good habit of thrift. lf one is found wasting again, he/she will clean the classroom alone after school for the whole week.
Thank you for your cooperation !