【正确答案】正确答案：Dear Prof. Zhang, I am writing to express my deep sorry for not being able to keep our appointment. I do know that this is very impolite and must have caused you much trouble. I do reckon that at present any explanation is pale and futile. However, I do not want you to misunderstand me. On my way to your office, an old lady suddenly fainted due to heart attack on the bus. I stopped a taxi and sent her into a nearby hospital. I stayed there until her son came, which spoiled our appointment. I am aware that our appointment is of importance. I do hope that you would be kind enough to spare your valuable time to meet me. I am looking forward to hearing from you. Yours sincerely, Wang Lin

【答案解析】解析： 该篇文章属于应用文文体写作，要求考生为自己的失约，向老师写一封道歉信。在写作时，首先一定要保证信件格式的准确性；其次，一定要注意时态，多用一般现在时和一般过去时。最后，考生一定要按照题目中所列出的三项要点来写，这三点缺一不可。值得注意的是，语言表达一定要诚恳，让对方体会到你道歉的诚意。