阅读下面短文，掌握其大意，然后从第1—20 各题所给的四个选项（A、B、C 和D）中，选出最佳选项，并在答题卷上将该项涂黑。
During the years when I was a teacher, I learned a lot of things. Perhaps the most important one was the life-changing  ________ of encouraging words.
I  ________  what Leo Buscaglia had done with his students in University of Southern California. In one class Leo Buscalia and his students had made two lists of ________ , one positive and one negative. Then they ________  the negative words into the trash bin and tried to use only the  ________ words for one month. They were ________ at how much better their lives became just by using words full of ________  .
I decided to try this as well by ________ something good to write on each paper my students ________ . No matter how many mistakes a student’s paper ________ , there was always a   ________ sentence, beautiful thought, or a great idea that I could  ________  on. I remember glancing over my desk and ________  some of the students reading those encouraging words  ________. It was a joy seeing their eyes shine a little brighter, their ________sit up a little straighter, and their learning climb a lot ________ .
I recently saw one of my ________ students and we talked for a while. He has got married, and has two children now. As I was saying goodbye, he said, “You know I ________   have a few of those old papers. I look at them from time to time. I just ________ my kids have a good teacher like you.” I was amazed at the ________those few positive words had on his life.
May your own life be forever full of encouraging words in your ears, from your lips and in your heart.

A．method B．ability C．power D．approach

A．improved B．learned C．wondered D．doubted

A．books B．words C．ideas D．tasks

A．threw B．collected C．stored D．wrote

A．familiar B．standard C．common D．positive

A．curious B．disappointed C．amazed D．confused

A．astonishment B．encouragement C．friendship D．advantage

A．buying B．finding C．asking D．wishing

A．took down B．put away C．looked through D．handed in

A．contained B．created C．avoided D．reduced

A．complete B．strange C．discouraging D．meaningful

A．agree B．comment C．bring D．depend

A．keeping B．having C．seeing D．leaving

A．now or never B．again and again C．little by little D．step by step

A．legs B．waists C．backs D．shoulders

A．further B．higher C．deeper D．wider

A．present B．clever C．careful D．former

A．ever B．never C．still D．merely

A．hope B．admit C．complain D．remember

A．result B．strength C．effect D．importance