1.
informal greeting, similar to Hi in English
2.
you say it to say good-bye
3.
used to say you are delighted to meet somebody
4.
it's informal to know what's going on
5.
you are saying see you tomorrow!
6.
used to ask how is somebody doing or feeling
7.
when you are having a rough day
9.
you want to know how old a person is
10.
you want to know somebody's name
