听一段材料，回答下面几个小题。
What is important to children according to the speaker?
A.Making mistakes.
B.Correcting their own mistakes.
C.Judging their own work.
What does the last sentence“Let him do it himself”really mean?
A.Let the teacher point out the mistake to the child.
B.Let the teacher make the child correct his mistakes.
C.Let the child notice and correct his own mistakes.
What’s the topic of the text?
A.Language.
B.Riding a bike.
C.How to educate children.