30． Many people go to school for an education.They learn Chinese，math，history，English and so（1）
Others go to learn a skill so that they can make a （2）
（live）.But no one can learn everything from school.A teacher can't teach his students everything（3）
they want to know.
The teacher's job is to show his students how to learn.So，much more is to be learned outside school by the students（4）
（they）.
（5）
is always more important to know how to study by oneself than to memorize some facts.Great （6）
（scientist） before us didn't get everything from school.Men like Edison did not even finish their primary school.But they are so （7）
（success）.The reason （8）
they succeeded is their hard work outside the school.They（9）
（know） how to study.They did thousands （10）
experiments.They worked hard all their lives.They didn't waste a single minute.
