你不能去派对吗？哦，那真可惜。

Can't you go to the party? Oh, that's such ___a ___pity.

真可惜你没记得给我这个消息。

It's ___a ___pity that you didn't remember to give me the message.

真遗憾你生病了，错过了学校旅行！

What ___a ___pity you were ill and missed the school trip!