"I am very disappointed because I do not know if we can have another one like him,"

VOA: standard.2009.06.28

But once you get there, you're very disappointed for several reasons.

但是一到那，你就发现有很多原因让你觉得相当失望。

Let's 课堂 - SpeakingMax英语口语达人

But he failed the test and he's very disappointed.

但他最后还是没有通过，于是他挺沮丧的。

I'm sure 课堂 - SpeakingMax英语口语达人