范文一

　　To whom it may concern:

　　I am writing this letter to invite our parents (name and brithdays) to visit us in (country) this coming (month) for aperiod of 6 months.

　　It goes without saying that we will cover all expenses duringTheir visit in (country), which includes international air tickets, local transportation, accmodations, medical

　　insurances and all other related expenses.

　　Your favourable consideration regarding their visa Applications will be highly appreciated. If you have any question regarding this matter, please kindly contact me at the address above

　　Sincerely,

　　***

　　范文二

　　Dear Mr. / Ms,

　　Thank you very much for your invitation to attend the 2007 International Fair. As we are going to open a repair shop in your city at that time, we are sorry that we shall not be able to come.

　　We hope to see you on some future occasion.

　　Yours faithfully

　　范文三

　　Dear Mr. / Ms,

　　We are much concerned that your sales in recent months have fallen considerably. At first we thought this might be due to a slack market, but on looking into the matter more closely, we find that the general trend of trade during this period has been upwards.

　　It is possible that you are facing difficulties of which we are not aware. If so, we would like to know what we can do to help. We, therefore, look forward to receiving from you a detailed report on the situation and suggestions as to how we may help in restoring our sales to their former level.

　　Yours faithfully