As the father of a student, I have experienced first hand what a great teacher is. My son was in the 4th grade last year, and he had a teacher called Miss Green. I believe that when he is an adult he will surely look back on her as the best teacher he has ever had.

    My son has attention deficit disorder(注意力缺损症) that makes it a little more difficult for him to learn.She was able to change her teaching methods for him so that he could keep up with the rest of the class. As a result, he got straight As on many subjects. She regarded her class as a family and they even had their own class song. She would often have them sing it to encourage them and develop a team spirit for them. When she saw that they were no longer listening carefully to what she was teaching, she would have them close their textbooks, stand up all around the room and throw around a small football. This helped them clear their minds and then focus on the lesson again.Besides, she was quick to reply to any phone calls or emails from us and got rid of our worries about children quickly.

    When my son went to the 5th grade this year, we happened to pass her classroom.When she saw my son, her face lit up and she came out and hugged him.She generally loves all of the children in her classroom and that love really shows.I can only pray that my son will continue to get teachers just like her for the rest of his school years.

    Birthdays often involve surprises.But this year's surprise on the birthday of the great British playwright William Shakespeare is surely one of the most dramatic.

    On April 22,one day before his 441st birthday anniversary,experts discovered that one of the most recognizable portraits（画像）of William Shakespeare is a fake.This means that we no longer have a good idea of what Shakespeare looked like."It's very possible that many pictures of Shakespeare might be unreliable because many of them are copies of this one,"said an expert from Britain's National Portrait Gallery.

    The discovery comes after four months of testing using modern chemistry technology.The experts from the gallery say the image—commonly known as the "Flower portrait"—was actually painted in the 1800s,about two centuries after Shakespeare's death.The art experts who work at the gallery say they also used modern chemistry technology to check the paint on the picture.These checks found traces of paint dating from about 1814.Shakespeare died in 1616,and the date that appears on the portrait is 1609.

    “We now think the portrait dates back to around 1818 to 1840.This was when there was a renewed interest in Shakespeare's plays,”Tarnya Cooper,the gallery's curator（馆长）,told the Associated President.

    The fake picture has often been used as a cover for collections of his plays.It is called the Flower portrait because one of its owners,Desmond Flower,gave it to the Royal Shakespeare Company.

    “There have always been questions about the painting,”said David Howells,curator for the Royal Shakespeare Company.“Now we know the truth,we can put the image in its proper place in the history of Shakespearean portraiture.”

    Two other images of Shakespeare,are also being studied as part of the investigation and the results will come out later this month.

    Self-driving vehicles will rely on cameras, sensors and artificial intelligence（AI）to recognize and respond to road and traffic conditions, but sensing is the most effective for objects and movement in the neighborhood of the vehicle. Not everything important in a car's environment will be caught by the vehicle's camera. Another vehicle approaching at high speed on a collision （碰撞）track might not be visible until it's too late. This is why vehicle-to-vehicle communication is undergoing rapid development. Our research shows that cars will need to be able to chat and cooperate on the road, although the technical challenges are considerable.

    Applications for vehicle-to-vehicle communication range from vehicles driving together in a row, to safety messages about nearby emergency vehicles. Vehicles could alert each other to avoid collisions or share notices about passers-by and bicycles.

    From as far as several hundred metres away, vehicles could exchange messages with one another or receive information from roadside units（RSUs）about nearby incidents or dangerous road conditions through 4G network A high level of A1 seems required for such vehicles, not only to self-drive from A to B, but also to react intelligently to messages received. Vehicles will need to plan, reason, strategize and adapt in the light of information received in real time and to carry out cooperative behaviours. For example, a group of autonomous vehicles might avoid a route together because of potential risks, or a vehicle could decide to drop someone off earlier due to messages received, a foreseen crowding ahead.

    Further applications of vehicle-to-vehicle communication are still being researched, including how to perform cooperative behaviour.

    Many experts say that Billy Wilder changed the history of American movies. He is often called the best movie maker Hollywood has ever had. He was known for making movies that offered sharp social comment. Wilder was one of the first directors to do this.

    Billy Wilder was born in 1906 in the former Austro-Hungarian Empire. Billy Wilder started law school in Vienna, Austria. However, he began reporting for a Vienna newspaper after graduation. By the 1920s, he was writing movies in Germany. However, the Nazis had risen to power in the nation. Wider was Jewish, and he recognized that he had no future in Nazi Germany. In 1933, he went to Paris. There he directed a movie for the first time. It was called “The Bad Seed”. Then he received word that producers in the United States had accepted one of his scripts. Billy Wilder left Europe for America.

    In America he formed a writing team with Charles Brackett. The two writers created many films together. Wilder and Brackett wrote several successful movies. One was the nineteen thirty-nine movie, “Ninotchka”, starring Greta Garbo. Ernst Lubitsch directed the film. Wilder always praised this man as a friend and teacher whose humor and expert direction greatly influenced his works.

    In 1954, Billy Wilder became an independent producer. The nest year, Wilder's first movie as an independent filmmaker was a huge success. It was “The Seven Year Itch”. In 1959, Wilder made a funny movie that was very popular. I.A.L. Diamond joined Wilder in writing “Some Like It Hot”.

    By the 1980s, Wilder no longer was considered the most unusual, creative movie-maker in Hollywood. In recent years, however, Billy Wilder received many more awards and honors. Critics praised his gifts to movie making. In 1987, the Academy of Motion Picture Arts and Sciences gave him the Irving G. Thalberg Memorial Award. It is the highest award a producer can receive.

    Hilary Smith belonged to a good family. But by the age of twenty, he had spent all the money the good old family had. He then had some trouble with the bank and was put in prison. He escaped from the prison and ran to Australia without delay.

    Hilary did not like Australia and Australia did not like Hilary. What he could do seemed to be one of two things: die or work. Then he remembered that he was not alone in the world. He had an aunt.

    She was his father's only sister, but his father used to say she brought no glory to the family. Hilary, of course, tried to discover what she had done. It seemed that she had failed to marry a nobleman. Instead, she had chosen a husband who was connected with "trade". Of course as soon as she became "Mrs. Parks", her brother considered her dead. Later on, Mr. Parks died and left her a lot of money; but that did not bring her back to life in her brother's opinion.

    Hilary discovered his aunt's address. Fortunately she remained faithful and honest to him even after she fell ill. So Hilary's star shone again, and soon he moved into her house and lived as comfortably as a sailor who had just reached harbor. He had only about six pence in his pocket.

    One thing was soon clear: his aunt was seriously ill, and nothing could cure her illness. Hilary was very worried. Fate had found a home for him, and was now going to throw him out of it. There was only one thing that could save him: her will.

    "Will?" she said, "yes, I have made one. That was when I was a girl and had not much money. I left all my money to some religious people."

    "Didn't you make another will when you were married?" Hilary asked.

    His aunt shook her head. "No," she said in a low voice, "There was no need. When I finally had a lot of money, I found I had no relations."

    On the next day he went to the public library and examined a book of law. It told him what he already believed. When a woman is married, an earlier will loses its value. A new will must be made. If no new will is made, the money goes to the nearest relation. Hilary knew that he was his aunt's only relation. His future was safe.

    After a few months had passed, Hilary's problems became serious. He badly needed money. He had expensive tastes, and owed a lot of money to shopkeepers. They trusted him because his aunt was rich, but the debt was terrible.

    Unfortunately his aunt did not want to discuss money matters at all. In the end they had a quarrel about the small amount of ten pounds. Hilary was not very angry. He began to wonder about a new problem. Was it kind to want his aunt to live any longer? Was it not better for her to die now? While he was considering what to do, his aunt told him that she was going to send for her lawyer. So she was going to make a new will, Hilary thought. She might leave all her money to someone else. Soon he reached a clear decision. He must do a great kindness to the poor old woman.

    One night when the old servant who had been nursing his aunt went off, he doubled the amount of some medicine. The total amount was too great and it could just put her to sleep forever.

    "Thank you," his aunt took the glass from his hand with a grateful look." I want, more than anything, to sleep, and never to wake up again. Is that what you wish, Hilary? Don't blame me if I have some doubts about what you intended to do. Sick people get these ideas, you know. One thing I ought to explain to you. Mr. Parks never married me. He already had a wife and couldn't marry again. That made your foolish father very angry with me...Well, if I am alive tomorrow, I shall make another will in your favor. If I die tonight, you'll get nothing...No, Hilary, don't try to take the glass away. If you do that, I shall know and I don't want to know. Good night, Hilary."

    Then, very carefully, she raised the glass to her mouth and drank.

    In China, there are more and more people leaving the countryside to hunt for jobs in the cities, because the countryside is much poorer than the city, and often there isn't much work there. Services such as hospital and transport are usually much better in the city than in the countryside. They hope that their lives will improve when they move to the city.

    But in the big cities of Europe like London or Paris, people are moving out of the city. These rich families want to live a quieter life. They are tired of the noise and the dirt of the city, and they are tired of the crowded streets, crowded trains and buses. They don't want to live in the cities any more. They want a house with a garden in the countryside, and breathe the fresh air there. So they move out of the cities. Some don't go very far, just a little way out of the city, to the towns near the cities. Other people move to the real countryside with sheep, cows and green fields. There they start new lives and try to make new friends.

    Not all those who move from the city to the countryside are happy. After two or three years, many people who have done this feel that it is a big mistake. They don't make so much money and there isn't much work to do. People in the countryside are different and aren't always very friendly. As a result, quite a lot of people who have moved to the countryside move back to the city. “It's wonderful to see crowds in the streets and cinema lights.” they say.