One afternoon, four black youths walked into a restaurant that served “whites” only. They sat down and ordered bread and milk. The white waiter just said “We don't serve blacks”. The young men did not move. They were tired to death of segregation（种族分离） and of being kicked around. The manager was called. When he saw the angry look in their eyes, he said that he was sorry, but it was not possible to serve them.

    The next day, more young black people came, and even more came the day after to the restaurant. Then a gang of white youths came in and attacked them. Most of the blacks were beaten up and were black and blue all over. After that the police rushed in, the several people were put in prison—all of them were black, although they had not done anything wrong—just because they were black.

    The news spread quickly through the black living areas in the city. A large crowd held a meeting round the restaurant the following day, forcing(迫使) the restaurant to shut. Young men, black and white, made speeches protesting against segregation and pointing out that black people only wanted to live a life in the same way that whites did. They gave out leaflets and soon the movement spread to other cities. Business became so bad at that particular restaurant that the owners were forced to give and served blacks.

    Nowadays, all the blacks are served in all restaurants open to the public in America.

    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.

    Thirty years ago I worked in a company. My job was to sell the cars. I was young and strong and I had been to most parts of the world and I spent one fifth of my time in the trains or planes. I liked such a life and sometimes I called myself "traveler".

    But one day I got into trouble. It was a cold morning. It blew heavily and the ground was covered with thick snow outside. I was still in bed though it was nine. I finished a long journey the day before and decided to have a good rest. Suddenly the telephone rang and my manager told me to fly to New York to take part in an important meeting. I had to get up and after a quick breakfast I hurried to the airport. The taxi went slowly and I missed the first flight. I had to take the next one. It meant I would wait for nearly five hours in the waiting-room. But five hours later a passenger said the information showed there was a bomb(炸弹) in our plane and the policemen were looking for it. And another five hours passed and most passengers lost their patience before we were allowed to get on the plane. At the entrance each passenger and their baggage(行李) had to be examined. A young man who seemed a soldier shouted at the policemen at the entrance, "If I had a gun in my baggage, I would shoot you two hours ago!"

The opening ceremony(开幕式) of the 19th Asian Games in Hangzhou was held on September 23ⁿd,

2023. People could see the electronic fireworks (烟花) in the night sky above the Hangzhou Olympic Sports Center Stadium. It showed us beautiful pictures, the latest technologies and environmental thoughts.

" The electronic fireworks paid attention to environmental protection," said Sha Xiaolan, the director of the opening ceremony." As long as fireworks are set off, there will be smoke in the air. It will cause pollution. Compared with normal fireworks which we usually set off, electronic fireworks never produce smoke and noise."

Why did they use this kind of fireworks? Because they were ' green', and Sha Xiaolan hoped to show environmental protection to the world. It did not mean there would be less excitement of the opening ceremony. According to the digital technology, 3D pictures, AR technology and more, the electronic fireworks have left a deep thinking on the people." People have rich feelings while they are watching the fireworks. Today is the first time I have seen electronic fireworks, and they are very eye- catching." He told China News reporters.

" High technologies helped produce environmental- friendly fireworks," Sha said." The research team designed fireworks with 3D technology. Then they did many experiments so that the fireworks had the best show without pollution."