原文：道歉信一般是在因过失或疏忽做错了事，给别人带来了麻烦或损失，发觉后要立即写信给对方赔礼道歉，这是一种礼貌。道歉信要写得坦率，诚恳。Suppose that Sarah, a friend of yours, has invited you … > 返回原文