1. It's nothing.
小事情；不足挂齿。
2. It's a long story.
说来话长。
3. It's about time.
时间差不多了。
4. It's incredible.
难以置信！
5. It's hard to say.
难说。
6. I can't imagine why.
我想不通为什么。
7. That can't be.
不可能。
8. That's really something.
真了不起。
9. Are you sure?
你确信吗？
10. Are you crazy?
你疯了吗？
