英语翻译Hello,Betty.What’s up?What are you doing in the library?

hello,what are you doing 英语翻译Betty:Hi,Peter.Peter:Hi,Betty.Betty:What are you doing?P what are you doing up hello world what are you doing hello!what are you doing ,dear hello ,what are you doing ,dear A:Hello,XXX What are you doing? What are you doing in the home? What are you doing in the s_______weather 美国人打招呼的What's up,What's happening,How are you doing,What's g 英语翻译what are you doing what's up?what's new,how are you doing?的区别和分别得回答