【答案解析】[参考范文]
Dear Sir/Madam,
I am writing to you to express my complaint about the ipad I bought from your online store the other day.
At first, I was quite pleased with my new learning device. It worked just fine. Unfortunately, after playing some games on it, the screen freezes every time when I try to get access to the "Dictionary" section. I reset the device several times but now the problem still exists.
Therefore, I suggest a free replacement for my device. Also to avoid similar complaints, your company should run stricter quality tests on products. Your prompt attention would be highly appreciated. I look forward to your satisfactory feedback.
Sincerely yours,
Li Ming
[解析] 本题要求写一封投诉信，此类信件的书写要注意三点：一是写信目的必须开门见山，即表达不满，进行投诉；二是简要描述事情经过；三是提出建议即解决办法，并表示希望尽快解决。