what’s up要怎麼回？

可以這麼回應：

1. 很棒啊。Awesome!
2. 很好喔。Pretty good!
3. 還不錯囉。Not too shabby!
4. 沒什麼啊。Nothing much.
5. 還行囉。Doing alright.
6. 老樣子啊。Same old, same old.