引入主题：
With reference to …
Further to …
With regard to …
I am writing in connection with …
注：引入主题的句子可以被写在信件的开头，但with regard to 不能用于信件的开头。
环境：(How would you start a letter about each of the following?)an invoice (No. 679) for a photocopier
With reference to Invoice No. 679, we regret to tell you that the product arrived in bad condition.
a meeting you had with the addressee on Jan. 16thFurther to the meeting on 16 January, I am delighted to tell you that we are now able to give you a special offer for our Peach Series computer.
an advertisement in the times newspaper
I am writing in connection with the advertisement in the times newspaper yesterday.
an application for a post as secretary in your companyI am writing in connection with your application for a post as secretary in our company.
a fax order for six computers that you received todaywith reference to your fax order for six computer, I regret to tell you that they are out of stock at present.
一级建造师二级建造师二级建造师造价工程师土建职称公路检测工程师建筑八大员注册建筑师二级造价师监理工程师咨询工程师房地产估价师 城乡规划师结构工程师岩土工程师安全工程师设备监理师环境影响评价土地登记代理公路造价师公路监理师化工工程师暖通工程师给排水工程师计量工程师
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