听一段材料，回答下面几个小题。
Why did the man put the paper on the floor?
A.He saw other people do so.
B.The basket was thrown away.
C. The basket was full.
Where does the conversation most probably take place?
A.On the playground.
B.In the classroom.
C.At the back of the school.
What will the man do next?
A. Put the waste paper in the dustbin.
B.Clean the playground.
C.Help others with the cleaning.