三 小作文
一 you have bought an air- conditioner from the department store, but soon it doesnot work very well, now write to the department store to 1) tell them what is wrong with the machine2) complain about the in convince it has brought about.
3)express your wishes that it should be repaired as soon as possible.
dear sir or madam,  i am a costumer who has bought an air conditioner last Sunday. now, i regret to tell you that the machine is really far from satifying.