Every teacher probably asks himself time and again：What are the reasons for choosing teaching as a career? Do the rewards of teaching outweigh the trying comments? Answering these questions is not a simple task．Let's see what the author says．
Why do you teach? My friend asked the question when I told him that I didn't want to be considered for an administrative position．He was puzzled that I did not want what was obviously a "step up" toward what all Americans are taught to want when they grow up：money and power．
Certainly I don't teach because teaching is 
easy for me．Teaching is the most difficult of the various ways I have attempted to earn my living．
I teach because teaching is a profession built on change．When the material is the same，I change the more important，my students change．
I teach because I like the freedom to make my own mistakes，to learn my own lessons，to stimulate myself and my students．As a teacher，I'm my own boss．If I want my freshmen to learn to write by creating their own textbook，who is to say I can't? Such courses may be huge failures，but we can all learn from failures．
I teach because I like to ask questions that students must struggle to answer．The world is full of right answers to bad questions．While teaching，I sometimes find good questions．
Besides，teaching gives me pace，and variety，and challenge，and the opportunity to keep on learning．
Last，teaching offers love．Not only the love of learning and of books and ideas，but also the love that a teacher feels for that rare student who walks into a teacher's life and begins to breathe．Perhaps love is the wrong word：magic might be better．These are the real reasons I teach，these people who grow and change in front of me．Being a teacher is being present at the creation，when the clay（黏土）begins to breathe．
I teach because，being around people who are beginning to breathe，I occasionally find myself catching my breath with them．
1．What do all Americans are to taught to get _______when growing up?
A．money and power B．freedom and happiness
C．wealth and safety D．life and money
2．The author chose teaching as a career because teaching________．
A．is full of love B．can change anytime
C．can make people breathe D．A & C
3．What does the author think of teaching_________?
A．it is difficult for him to do B．it is free to make mistakes
C．it brings him too much D．it makes me him lose much
4．According to the passage，failure is also ___________．
A．an enemy B．a lesson C．a teacher D．a friend
5．The best title of the passage is _____________．
A．Teaching is terrific B．Teaching is difficult
C．Why I like teaching D．Why I chose teaching as a career