what’SUP 要怎麼回覆？

Here are some responses you can give:

1. Awesome! 非常棒！
2. Pretty good. 還不錯喔。
3. Not too shabby. 也還可以。
4. Nothing much going on. 沒什麼特別啊。
5. It's all good. 就這樣啊。
6. Same as always. 跟往常一樣。