I never thought I would have a life-changing experience at Wal-Mart.

      Although my thoughts were only on speed, the checkout line I was standing in wasn't moving as quickly as I wanted, and I glanced toward the cashier.

      There stood a man in his seventies, wearing glasses and a nice smile. I thought, well, he's an old guy! For the next few minutes I watched him. He greeted every customer before scanning the items. Sure, his words were the usual, “How's it going?” But he did something different-he actually listened to people. Then he would respond to what they had said and engage them in brief conversation.

      I thought it was odd. I have grown accustomed to people asking me how I was doing simply out of robotic conversation habit. After a while, you don't give any thought to the question and just mumble something back. I could say, “I just found out I have six months to live,” and someone would reply, “Have a great day!”

      But that wasn't the end.

      He gave them the change, walked around the counter, and extended his right hand in an act of friendship. He looked at the customers in the eyes. “I sure want to thank you for shopping here today,” he told them. “Wish you have a great day. Bye-bye.”

      The looks on the faces of the customers were priceless. There were smiles and some sheepish grins. All had been touched by his simple gesture-and in a place they expected. They would gather their things and walk out, smiling.

      Of course, he did the same to me and I got to know his name, Marty.

      Who was the guy? It was as if Sam Walton had come back from the dead and invaded this old guy's body.

      I had never walked away from that shop feeling like that.

A

    Bill always does everything very carefully．Everyday he drives his car to go to work and go home．He drives his car slowly and never has an accident．He often says that travelling by car is much safer than travelling by plane．

    Today，he has to go to another city to have a meeting．The meeting will begin at nine o'clock．And it is eight now．If Bill goes there by train or by car, he will be late for the meeting．Bill has no idea．One of his friends，John，says to him，"Don't worry, Bill．I can take you there in my own small plane．And we can get there at half past eight．"Bill is afraid of going there by plane．John tells him that it is very safe．Bill gets on the plane at last．

    John starts the plane and begins taking off．Bill is too afraid，so he closes his eyes．After a minute or two，he opens them again，looking out of the window of the plane，and says to John，"Look at those people down there，they look as small as ants." "But they are ants." says John．"Don't you know we are still on the ground?"

    In the 1920s, the airlines were just beginning. It was unusual for people to travel by air because it was expensive and dangerous. In those days, there were no flight attendants (服务生) to look after the passengers. Young men, or “stewards” helped the passengers onto the airplane and carried the passengers' bags but they did not provide food and drinks. But then in 1930, a woman called Ellen Church invented the “stewardess”.

    Ellen Church was born in 1904 on a farm in Iowa. She was a different child. She didn't want to work on a farm or marry a farmer. She wanted a more adventurous (冒险的) life. Ellen studied to be a nurse at the University of Minnesota and then got a job in a hospital. For the next few years she stayed at the hospital and at the same time took flying lessons and got her pilot's license.

    Ellen was 25 years old when she first got in touch with BAT (Boeing Air Transport). She loved flying but she understood that airlines were a man's world. Though women like Emelia Earheart were becoming famous, she realized it was impossible for a woman to have a career as a pilot. But she had another idea. Most people were afraid of flying because flying was still not a very safe way to travel. There were often delays (延误), many crashes and the bad weather made many passengers sick. Ellen thought nurses could take care of passengers during flights and BAT agreed.

    The young woman from Iowa and seven other nurses became the first air stewardesses.

    At first pilots were unhappy because they did not want stewardesses on airplanes, but passengers loved the stewardesses. In 1940 there were around 1000 of them working for different airlines. The early “stewardesses” had to be under twenty-five-year-old, single and slim. When a woman joined an airline, she had to promise not to get married or have children. It was a hard job and not well paid. They worked long hours and was paid $1 an hour.

    In the 1970s, stewardesses were unhappy in their job and airlines had to make some changes. Since the 1970s, “stewardesses” have been called flight attendants. They are well paid and work fewer hours than in the past.

    It was the last day of the final examination in a college. On the steps of a building, a group of engineering students were waiting for the last exam. On their faces was confidence.

    They knew the exam would be easy. The professor had said they could bring any books or notes during the test.

    Right after they came into the classroom, the professor handed out the papers. There were only five questions on it.

    Three hours passed. Then the professor began to collect the papers.  The students no longer looked confident. On their faces was nervous expression. The professor watched the worried faces before him, and then asked, "How many of you have completed(完成) all five questions?" No hand was raised. "How many of you have answered four?" Still no hands.  "Three? Two?" The students moved restlessly in their seats. "One, then? Certainly somebody has finished one. "But the class kept silent. The professor said, "That is exactly what I expected. I just want to make you know clearly that even though you have completed four years of engineering, there are still many things about the subject you don't know. These questions you could not answer are common in everyday practice. "Then, smiling, he added, "You will all pass this course, your education has just begun."

    The years have obscured the name of this professor, but not the lesson he taught.

    "Some gifts are tiny. Some gifts are needed. And some gifts... some gifts are priceless, "says 26-year-old Sarah Bricker of Minneapolis, USA. She had suffered from（受…之苦） hearing loss until she received the gift two years ago for Christmas --her first hearing aids（助听器）. They were from her parents. Here's what else she says:

    "I remember the moment they were fit to my ears. And I remember every first that came after--The first time I heard my mother's voice. The first time I heard my father cry as he realized 1 could hear my mother. The first time I listened to Winter Wonderland on the radio and heard every word clearly. The first time I heard my best friend's voice, calling from England to wish me a Merry Christmas.

    "My hearing aids are probably the best Christmas gift my parents have ever given to me. It might sound strange to say that, but until you lose your hearing, you never fully understand how unbelievablly valuable it is. How you miss the moment your partner says 'I love you. How you miss the jokes that everyone laughs at. How you miss- life. But now I don't miss life anymore."

    However, he hearing aids were more than Just about hearing. They gave Sarah self-confidence（自信）,more chances to make new friends, the courage to take on new challenges. "Every day, they return to me a moment, a sound, a voice. They return to me the kaleidoscope（万花筒） of a life I'd once thought forever dark."

    After learning about these famous women, you will know you can do a lot for society, and make a difference to the world in your lifetime.