Why are you in such a good mood?你怎么心情这么好?
I hope we'll meet again some time.希望不久后能再见到你。
How are you doing? 你好吗?
What's up? 有什么新鲜事儿?
pleased to see/meet you again.很高兴再次见到你。
How's everything? 一切都好?
Nice to meet you. 很高兴见到你。
How do you feel today?你今天觉得怎样?
How come you look so tired?你怎么看起来这么疲倦?
How's life treating you? 日子过得还算惬意吗?