2023年是學校建校十周年。值此校慶來臨之際，學校將舉辦一系列精彩的校慶活動。假設你是學生會主席李華，請根據以下要點提示代表學生會寫一封邀請函，邀請歷屆校友參與校慶活動。
要點：
一、介紹校慶時間：12月20日
二、介紹校慶活動：（1）校長致辭、專家講座；
（2）校園參觀、校史展覽；
（3）文藝匯演、校友視頻；
（4）……
三、邀請校友參加校慶活動
參考詞匯：校友 alumni [pl.] 展覽 exhibition
要求：
（1）詞數80左右（開頭已給出，不計入總詞數）；
（2）要點齊全，可適當發揮；
（3）不得出現真實姓名和校名；
（4）條理清楚，語句通順，意義連貫，書寫規范。
Dear alumni，
   This year marks the 10th anniversary of the founding of our school.______
Yours sincerely，The Student Union

【考點】書信類；學校生活．

【答案】Dear alumni，
   This year marks the 10th anniversary of the founding of our school.In order to celebrate it，our school is about to organize a variety of wonderful events on December 20th.
   The celebration will start with a keynote speech given by our beloved head teacher.After that，some experts will give lectures on the hottest topics related to education.Later，some students are going to act as tourist guides to show you around the newly built campus.A school history exhibition is there to honour the achievements，progress and growth of our school over the past 10 years.You cannot miss the Arts Festival.Plenty of talented students will give great performances.What excites you most is perhaps the videos shot by alumni，in which you may find your friends whom you have not seen for a long time.Afterwards if you want to show your feelings for the school，you are more than welcome to leave a note on the message wall at the school gate.And to record such great moments，a photographer will be there taking photos which can be downloaded by scanning a QR code.
   The 10th school anniversary ceremony and celebration will be a great chance for reunion.You are cordially invited to join us and share the joy.
Yours sincerely，
The Student Union