隨著科技的發展，幾乎每個高中生都有自己的微信號，交流特別方便。但很多學生花太多的時間用微信和朋友聊天。假設你是學生會主席李華，請你以學生會的名義給全校學生寫一份英文倡議書，倡議大家減少使用社交媒體的時間。內容包括：
1.倡議的目的；
2.過度使用社交媒體的危害；
3.發出倡議。
注意：
1.詞數100左右；
2.可適當增加細節，以使行文連貫；
3.開頭和結尾已給出，不計入總詞數；
4.參考詞匯：社交媒體social media.
Dear all，
   I'm Li Hua，chairman of the Students' Union.____________
Students' Union

【考點】提綱作文；科技生活；倡議書．

【答案】Dear all，
I'm Li Hua，chairman of the Students' Union.I'm writing to advocate all the students to reduce the time of using social media on behalf of the Students' Union of our school.
Recent years have witnessed the high development of science and technology，bringing great convenience to our daily communication.However it is not uncommon that quite a few students attach too much importance to their "virtual" friends on social media，influencing their relationship with friends in real life.Worse still，social media has occupied too much of their spare time，even their study time，doing harm to their academic results.
Please be aware of the problem.Let's use social media properly and limit our time on it.
Students' Union