【正确答案】
[参考范文]
Ladies and Gentlemen,
Today I feel so pleased because I'm given this opportunity at the party to address the problem of waste disposals on the school campus. Some of us just threw, among many others, their used paper, empty bottles and the like carelessly into the garbage cans in our school buildings, ignoring the signs on them that these materials must be separately disposed of. It should be noted that these wastes can be recycled and be turned into useful things, especially in such a consumerist society. Notice the signs and deal with the wastes in an economical way, and we will become a responsible citizen in the modern society.
Truthfully yours,
Li Ming