尊敬的先生：
感谢你方十月二十七日的来函，我们将寄给你们必要的形式发票，一式三份。请注意我们的报盘有效期截止到十一月十五日，期盼早日收到你方的订单。
我们的缝纫机销售的很快，对于我们的产品已经有大量的询价。请立即采取必要的措施。
谨上
【正确答案】：Centlemen
Thank you for your letter of October 27. We are sending you the required proforma invoice in triplicate. Please note that our offer remains valid until November 5. We look forward to receiving your order at an early date.
Our sewing machines are selling fast, and there have been numerous inquires about them. Please take the necessary steps without delay.
Yours truly,
