参考范文：
　　Dear Han Dong,
　　I am a sophomore and I'm taking the CET-4 for the second time. It has cost lots of money and time to prepare for the exam. Meanwhile, my schedule is getting tighter, for I have to take much more classes than before. So I really want to make things work this time. That's why I'm writing to you for help.
　　My biggest headache is the listening part, whose proportion becomes even more after the CET exam reform. Moreover, my vocabulary is poor, too. I'm wondering if there is any short-cut to memorize words more quickly in shorter time. I also want to know in what degree a CET training class can help. Finally, I need you recommend some better books to me.
　　I'm gratefully looking forward to your reply.

　　Sincerely yours,
　　Li Qiang