A sales leter is a means of advertising.

推销信是广告的一种方式。

Moment Leter Here you are.you may try it on.

(过了一会儿)给你，你可以试试。

So providing with a good excuse in the closing paragraph is indispensable for readers to answer your leter.

因此要给客户提供必须给你的回信的最好的理由。

When I got a leter from the school, which was mot a solid rejection, saying my SAT score did not reach the minimum for allowable admission, I began lose hope.

但我受到学校来信的时候，我开始失去希望了，信中说我的SAT分数没有达到最低录取分数线，但并没有一口拒绝。