boys and girla :
may i have your attention, please ? now i'd like to make a speech here .
at present , it's an universal phenomenon that many students often waste food and let the water running after washing , which will do great harm to our limited resources . meanwhile , we may develop the form of much bad habits in turn .
so , in thiscase , i want to make a callon all the students to protect our environment and make a contribution tothe economical society as well . only by this waycan we have a more harmonious world .
that' s all , thank you !
批 改 老 師oscar評分80分級別優良評語
批改：
1. boys and girla : 開頭稱呼單詞拼寫有錯誤。
2.it's an universal phenomenon that many students often waste food and let the water running after washing , 首先，冠詞使用錯誤；其次，後邊應該是動詞原形。
3. we may develop the form of much bad habits in turn . 本句話說的囉嗦，直接就說 our bad habits will be developed.
評析：
本文是一篇發言稿，所以在格式上應該符合發言稿的格式，比如在最後落款沒有發言人的姓名等；其次中間出現了幾個語法錯誤，而且書寫不是太規範。希望繼續努力！！！