dear______,
i am writing to extend my sincere gratitude for __________________(感谢的原因). if it had not been for your assistance in __________________(对方给你的具体帮助), i fear that i would have been ___________________(没有对方帮助时的后果).
every one agrees that it was you who ___________________________(给出细节). again, i would like to express my warm thanks to you! please accept my gratitude.
yours sincerely
li ming
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