A: Hey what are you doing now
B: Hey.do not i just clean up a very dirty clas i dont like
A: owhhh its like you need help,may i help you clean up?
B: yeas of course 
A: Need a hand?
B: Sure.
A: Everyone seems so busy with their class displays. Am I missing something?
B: You must be new here. People are busy cleaning up. It’s Clean Saturday!
A: So Saturday is the day isn’t it?
B: Right.
A: Nice to know that people still care about their environment.
B: You’re really something. Let’s finish this