School education is very important and u      . Yet no one can learn        at school and a teacher cannot teach his students everything they want to know. His work is to show his students _      to learn. He teaches them to read and think alone. So much more is to be learned outside school by the students      (他们自己). It is always more important to know how to study by oneself. It is quite easy      learn something, but it is difficult to use it to solve p      . Great inventors don’t get everything at school, but they still can make many things and     (改变) the world a lot. How can the inventors do all of this? One of answer is : They know how to study. A lot of things are not t      in the classroom. They get a lot of        （知识）by reading outside school. They work h    and never give up all their lives.