what’SUP 要怎麼回覆？

可以這樣回覆：

1. Great. 真棒啊
2. Good. 不錯哦
3. Not bad. 還行呢
4. Nothing. / Nothing much. / Not much. 沒什麼特別啊
5. Alright. / Just life. 還好啦
6. As usual. / Same old. 老樣子了