[范文]
Dear Mr. Johnson,
   On behalf of the organizing committee, I am writing to invite you to be a judge of the upcoming English speech contest of our college.^[1]
   The contest will be held at the Multifunctional Hall next Friday evening.^[2] The topic focuses on pursuing a further study abroad. As the most popular foreign teacher in our college, you are the fittest person we can think of. You need to ask each contestant one or two questions and then grade them on their overall performance.^[3] We will be more appreciative if you could also give a wrap-up comment and make some helpful suggestions at the end of the event.^[4]
   It is our sincere hope that you would accept our invitation.^[5] We are looking forward to your reply at your earliest convenience^[6].
   
   

[解析] 文章开头处在I am writing to...之前是一个介词短语on behalf of the organizing committee...，不仅使句式更如灵活，也使邀请更有说服力。
   [2]第二段第一句开门见山，直入主题，告知被邀请人比赛的时间、地点；随后介绍了演讲的主题，内容充实。Multifunctional Hall意为“多功能厅”。
   [3]本句介绍了外教作为评委的主要职责，you are the fittest person we can think of意为“您是我们能想到的最合适的人选”。
   [4]We will be more appreciative if...是说“如果...我们将更为感激”。a wrap up comment意为“总结性评论”。
   [5]尾段首句用了强调句It is our sincere hope that...，表明了写信人的真诚和期待。
   [6]We are looking forward to your reply是信件结尾的常用句型。其中at one's earliest convenience是客套话，表示“在某人(最早的)方便的时候”。结尾句还可以有其他的表达法，如：“Please inform us of your decision at your earliest convenience.”、“Your prompt attention to my letter would be highly appreciated.”等等。
    通用模板
   Dear称呼，
   On behalf of代表的单位，I am writing to invite you to写信的目的.
   The contest will be held 比赛的时间和地点. The topic focuses on 比赛的主题和内容. As 对方的身份, you are the fittest person we can think of to 希望收信人做的具体事宜. We will be more appreciative if you could also 希望收信人做的另一件事.
   It is our sincere hope that you would accept our invitation. We are looking forward to your reply at your earliest convenience.
   
   

[范文]
   As is depicted in the picture, a large group of graduates are coming to a fork in the road.^[1]A variety of choices, ranging from finding a job, taking part in the entrance exam for postgraduates, going abroad to starting a business of their own^[2], lies in front of them. They have to make a choice, which will largely affect their future.
   So which direction should graduates take?^[3] If they want to make a wise decision, the following factors should be taken into consideration^[4] To begin with, graduates are supposed to know the different characteristics of each choice. A good analysis of the advantages and disadvantages of these choices may prepare a favorable start for the future.^[5] In addition, they should make a fair evaluation of themselves. This will help them know better about what will be the most suitable for them and bring their potential into full play. Last but not least, as young people, they should hold a practical attitude. Though some people achieved great success in one leap, usually progress is made step by step.^[6]
   Making a sensible choice before graduation is indeed of primary significance in one's career planning. But this choice does not decide everything once and for all.^[7] Flowers and thorns line every road at the same time ^[8], so graduates must get ready to face the coming new life with more wisdom and courage.

[解析] 开篇第一句描述图片内容。fork除了表示“叉子”以外，还可以表示“岔路”。
   [2]现在分词短语ranging from...to...作后置定语修饰choices，from和to的后面接不同的“发展方向”，使用动名词，语言精练，行文流畅。
   [3]第二段第一句，采用设问，自然地引出下面的论述。
   [4]第二段的第二句是中心句，之后用To begin with、In addition、Last but not least分层次为毕业生解读如何才能作出正确的人生选择，条理清晰。
   [5]may前面的部分是句子的主语，长短主语交替使用，错落有致。 prepare a favorable start for the future意为“为未来准备一个良好的开端”。
   [6]本段分为三点论述，首先指出要分析目标，其次指出要分析自身，最后强调要有踏实的态度，观点新颖，不落俗套。bring...into full play、hold a practical attitude、achieve...in one leap都是值得积累的亮点短语。
   [7]该段第一句用动名词短语作主语，强调作出正确选择的重要性，从第二句开始，作者给出了自己更为深入的观点。once and for all意为“一次性地，一劳永逸地”。
   [8]line the road描述某物在道路的两旁排列、延伸的景象，flowers和thrones分别暗喻顺境和逆境，体现辩证思维。