假設你是林華，福建省某中學高三學生，請你根據以下學生會倡議書的內容給某英文報社寫一封信，敘述擬開展活動的內容并發表自己的看法。

　　注意：1.信的開頭語已經給出，不計入總詞數;

　　2.可根據內容要點適當發揮，但不要逐條翻譯;

　　3.詞數100左右;

　　4.參考詞匯：增進promote;鼓勵條約encourage economy

　　Dear editor,

　　范文：

　　Dear editor,

　　I am a student of Senior Three in a middle school in Fujian Province.

　　In order that we can make the best of learning materials,the Students Union of our school is arranging an activity.We students of Senior Three are called on to give away our used books,newspapers or magazines to the students in the lower grade.The idea,which is intended to promote friendship and encourage economy,is highly praised and supported by the teachers and students alike.The activity will last about ten days,from June 10 to 20.

　　As a student,I am strongly for the activity because it is very meaningful and helpful.I hope that this kind of activity will continue in the future.

　　Yours sincerely,

　　Lin Hua