Cause of noisy

our class had problem today.
It start when mr hary, our math teacher, angry to us.And mrs arifah know about it. we know that my class is very noisy. and we don't think that mrs.arifah angry to us because she really want. we know that she angry to us because of our mistake. we never see mrs.arifah looks very angry like today. We are sorry about that,mrs..
we'll try to be quite. try to be more seriously.
we are really sorry ..