---I'd like to invite you to dinner at my house this Saturday,Miss Black.

问题描述:

---I'd like to invite you to dinner at my house this Saturday,Miss Black.
---____________.
答案是"I'm sorry,but I have other plans."
but不是表转折么,为什么这里可以这么用?
为什么不选"You are welcome."表应邀说谢谢

英语常用口语句子,表示歉意、难过、惋惜、不安、或遗憾、内疚等,多数时候译为“对不起”、“抱歉”或“请原谅”.其非正式说法为Sorry.
You are welcome.是中国式英语的理解法