题目内容：

 

  Many people go to school for an education． They learn languages, history, geography, physics, chemistry and mathematics． Others go to school to learn a skill so that they can make a living． School education is very important and useful． Yet no one can learn everything from school． A teacher, no matter how much he knows, cannot teach his students everything they want to know． The teacher’s job is to show his students how to learn． He teaches them how to read and how to think． So, much more is to be learned outside school by the students themselves．

It is always more important to know how to study by oneself than to memorize （记住） some facts or a formula （公式）． It is usually quite easy to learn a certain fact in history or a formula in mathematics． But it is very difficult to use a formula in working out a maths problem． Great scientists, such as Einstein, Newton and Galileo didn’t get everything from school． But they were all so successful． They invented so many things for mankind． 

Above all, they knew how to use their brains．

1.Whether he is more ________or less, a teacher can’t teach his students everything they want to know．

       A． important       B． useful             C． difficulty        D． knowledgeable

2.A teacher’s job is mainly to train his students to master the ability of __________．

       A． learning by themselves                B． making a living  

       C． reading and thinking                  D． studying all the subjects

3.The reason for scientists’ success is that _______．

       A． they read books that were not taught at school  

       B． they worked all their lives

       C． they wasted not a single moment            

       D． they knew how to use their brains