Dear Sirs:
You remember poor Oliver Twist, Dickens’s little boy who dared to “ask for more”, and was held up for the other inmates of the workhouse as a shinning example of ingratitude. [1]
In writing you this letter, I am emulating that unfortunate youngster, but hoping you will not visit his punishment upon my head.
To end more briefly than I began, I am grateful for the laundry business you’ve been sending us, but very very ear-ger that you should try some of our other services----dry cleaning, for example. l2]
You know that our laundry work is distinguished by a more-than-ordinary amount of care and attention. Please believe that you will be equally delighted with our unusual dry-cleaning service. [3]
Sincerely yours,
Kevin
[1]以名著片段为例,吸引读者。
[2]表达自己写信的目的。
[3]介绍宣传自己的产品的优点,促使读者产生购买服务的愿望
[4]再次直截了当地请求对方试用。

