What's up? 出什么事啦?
What's happening?
How's everything? 怎么样,还好吧?
It's going pretty well.
How's your family?你的家人怎么样?
Everyone's fine.
How's it going? 怎么样?
How's business? 工作怎么样?
Not bad. 还可以
How did it go today?*用于会议或聚会等场合
今天怎么样?
Oh, same as usual. 和往常一样.
So-so. 还凑合吧。