.投诉信 Dear xiaoli:I am sorry to learn about the problem that has been troubling you recently. My suggestions are as follows: First of all , you should complain directly to the general manager, presenting the warranty , or any other record given to you. Besides , I think it necessary for you to show him what is wrong with the laptop that you bought in their store. Tell him politely but firmly that your computer needs to be changed because it often has a black screen and does not work su
