I apologize for not getting back to you sooner,...

Here are my suggestions:

..., but, regrettably, I have yet to fulfill my promise.

..., but, regrettably, I have yet to keep my word.

photography masterpiece(s)

所有跟帖: 

非常感谢!这是我想学的!:) -beautifulwind- 给 beautifulwind 发送悄悄话 beautifulwind 的博客首页 (0 bytes) () 05/08/2021 postreply 15:11:33

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