词汇：

complain against sb. about sth.投诉......

dissatisfaction with不满于......

put up with / bear / tolerate忍受

awful 糟糕的

poor service糟糕的服务

inconceivable不可思议的

out of one’s expectation令某人大失所望

look into / go into / investigate调查

incident / matter 事件

sanitary situation卫生条件

bad manners 不礼貌

disturbance干扰

nuisance 麻烦事

remedy 补救

solve解决

recurrence再次发生

句型：

1) I am writing to you to complain about ...

2) I am writing to express my dissatisfaction with...

3) There are some problems with the flat that I wish to bring to attention. For one thing, there is…For another,...

4) I can hardly bear /tolerate /put up with it any more.

5) I hope that the authorities concerned will consider my suggestions and improve the situation as best as they can.

6)I sincerely hope that it will review its management system, with the view to providing, better service to the public.

7) We trust that you will now consider this matter seriously and make an effort to prevent the recurrence of this kind.

8) We will appreciate your willingness to make up for the loss.