完形填空。通读全文，掌握其大意，然后从各题所给的A、B、C三个选项中选出一个最佳答案。
School education is very important and useful.________ no one can learn everything from school . A ________ ,no matter how much he knows ,can not teach his students everything they want to know.
It’s ________ important for teachers to show their students how to learn than to make them ________a certain fact or a formula（公式）,so that they will learn much more outside school by________ .Great scientists before us didn’t get everything from school. Their teachers only showed them the________ .Edison didn’t even finish primary school. But he was so________.He invented so many things________ human beings. The________to their success is that they knew how to learn, worked hard and wasted not a single moment all their lives. And above all. They knew how to ________ their brain（大脑）.
A. But           B. So             C. And
A. teacher        B. headmaster      C. learner
A. much          B. more           C. very
A. to learn       B. learn          C. learning
A. them          B. themselves     C. himself
A. idea          B. rule           C. way
A. important      B. helpful        C. successful
A. to            B. of              C. for
A. fact          B. result         C. secret
A. make         B. test           C. use