【正确答案】标准范文
Dear Prof. Wang,
I'm deeply sorry that I was unable to keep my engagement to meet you at 11 o'clock yesterday morning. I know that you are displeased with my failing to keep my promise, but I hope you will forgive me.
My mother had a sudden stomachache early yesterday morning, so I had to send her to hospital. After many checkups, a doctor diagnosed her illness as diarrhea and prescribed some medicine. When I accompanied her back home, it was already 1 o'clock in the afternoon.
I've been told that you' re very busy these days, but I hope that you could arrange another appointment for me. Would it be convenient for you that I go to your office tomorrow afternoon?
I look forward to your early reply.

【答案解析】写作要点
从本题所给的信息可以判断出，这里要求完成的是一封道歉信。道歉信是写信人对未尽之事向收信人表示歉意。因此语言要诚挚，解释的理由要真实，不要显出丝毫虚情假意，从而使收信人理解，并达到最终谅解。根据试题要求，本篇作文的结构大致可安排如下：在道歉信第一段，开门见山就自己未能如约与老师见面表达歉意；然后，请求对方的原谅；最后按照题目要求，提出自己的请求，希望另行安排见面时间。