考研英语一小作文,书信,请英语好的童鞋或是英语老师赐教啊!

题目

考研英语一小作文,书信,请英语好的童鞋或是英语老师赐教啊!
Dear Sir or Madam,
I am writing this letter in purpose of expressing my dissatisfactory about the electronic dictionary I have bought from your online store three days before.I prefer to change a new one for me,as I find the machine I have received yesterday always shut down in no reason when I was using it.
I must explain that I have read the instruction book several times,and I am promise every step I have tried is right.It must has something wrong with this product.To surmount the difficulty,I would like to send this dictionary back to your after-sell service,in return,I am sure you will agree that deliver a new machine for me.Please check the new one’s quality before you send it.I hope this situation will not happen again.
I would like to express my gratitude for your consideration of my request.I look forward to hearing from you soon.Yours sincerely,
Zhang Wei

答案

instruction book?说明书吗 直接用instruction不好吗and i am promise 这是两个动词吧it must has 情态动词后面要用原型 而且这句话很不通顺 你可能是想说“有”那也改用therebe啊 there must be something wrong wi...