greeting for meeting in everywhere

when you want to greet someone. There are many words for saying or when you have a class and see your friends or you see your new friends then you want to say "hello" with them. it is easy way to use of greeting.
Hello.
Hi.
Good morning?
Good afternoon?
Good evening?
long time no see.
what's up?
How are you?
How is it going?
How have you been?
How have you been going?

Prompol Bantumporn 52010513028 3EN