2.Dear Mr. / Ms，

　　I was very concerned when I received your letter of yesterday complaining that the central heating system in your new house had not been completed by the date promised.

　　On referring to our earlier correspondence，I find that I had mistaken the date for completion. The fault is entirely mine and I deeply regret that it should have occurred.

　　I realize the inconvenience our oversight must be causing you and will do everything possible to avoid any further delay. I have already given instructions for the work to have priority and the engineers working on the job to be placed on overtime. These arrangements should see the installation completed by next weekend.

　　Yours faithfully

　　尊敬的先生/小姐，

　　昨天收到你的来信，抱怨你新家的中央加热系统未按规定时间装好，对此我非常关心。参考较早的通信，我发现我搞错了完成日期。错误完全是我的，对此我非常抱歉。

　　认识到我们的疏忽给你造成的不便，我们将竭尽全力避免再耽搁。我已指示这项工作优先做并让工程人员加班。这样安排会于下周完成安装。

　　你诚挚的

　　G. 提示Attention

　　1.Dear Mr. / Ms，

　　On 14 November I submitted a bill for services rendered to your office at the Lille International Exposition. More than a month has now elapsed without payment or acknowledgment of my bill. Please check this oversight，and remit payment at your earliest convenience. I look forward to future services to your corporation.

　　Thank you for your prompt attention to this matter.

　　Yours faithfully

　　尊敬的先生/小姐，

　　十一月十四日我向你办公室在Lille国际博览会上提供的服务提交了帐单。一个月过去了你既没有付款也没有认可帐单。请检查这一疏忽并在最方便的时候付款。期望以后还为你公司服务。

　　谢谢您能对此事尽快重视起来。

　　你诚挚的