道歉信、邀请信、建议信、投诉信
道歉信
Dear ______,
①I am truly sorry that ______（道歉的原因）.
②The reason is that ______（介绍原因）. ③Once again, I am sorry for any inconvenience caused. ④Hope you can accept my appologies and understand my situation.
Yours sincerely,
Li Ming
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