我有个道歉要向你说——恐怕我误拆了你的信。

I have an ___apology to make to you - I'm afraid I opened your letter by mistake.

我欠你一个道歉，克里斯。

I owe you an ___apology, Chris.

嗨，Zita，请接受我为这封迟来的信的道歉。

Hi Zita, Please accept my ___apology for this belated letter which you're holding in your hands.