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Dear_________,

　　I am writing this letter to express my sincere gratitude for___________.Had it not been for your assistance in ___________,I fear that ___________may not have____________.I’d like you to know that your help __________.It not only____________,but also__________.I shall always remember__________.

　　I hope that I will have the opportunity of returning your hospitality by inviting you to ______.Will you kindly let me know whether you____________?I am looking forward to seeing you soon!

　　Again,I would like to express my thanks to .Please accept my appreciatin and pass my best wishes on to ____________.I hope to hear from you soon.

Yours,

___________

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