— What do you think of your English teacher?
— He is friendly to us although sometimes he looks 　　　.
A. happy           B. kind        C. serious    

Ask three people to look out the same window at a busy street corner and tell you what they see. Chances are you will receive three different answers. Each person sees the same scene（场景）, but each perceives（察觉）something different about it.

　　 Perceiving goes on in our minds. Of the three people who look out the window, one may say that he sees a policeman giving a motorist a ticket（罚单）. Another may say that he sees a rush-hour traffic jam at the intersection. The third may tell you that he sees a woman trying to cross the street with four children in tow（拉着）. For perception（感知） is the mind’s interpretation of what the senses—in this case our eyes—tell us.

　　 Many psychologists（心理学家） today are working to try to determine just how a person experiences or perceives the world around him. Using a scientific approach, these psychologists set up experiments in which they can control all of the factors. By measuring and charting the results of many experiments, they are trying to find out what makes different people perceive totally different things about the same scene.

1.Perceiving is an action that takes place _____.

2.People perceive different things about the same scene because ____.

3.Psychologists study perception by _____.

4.The best title for this article is _____.

阅读下列短文，完成短文后面的表格内容。（各小题不超过5个词）　　

George Stephenson was born in 1781 in a poor family. He had to start work when he was only eight. When George was fourteen, he became his father’s helper. He spent a lot of time learning about engines. On holidays, he often took engines into pieces and studied each piece carefully. Soon he became a very good worker though he could not read or write.　　

He began to learn the English letters when he was seventeen years old. Every day after he did twelve hours of hard work, he walked a long way to have lessons from a young teacher.　　

On his eighteenth birthday, he wrote his own name for the first time in his life. George invented many things in his life. The train was the greatest one among them. Today when we watch or take trains from one place to another, we will think of this great man ------George Stephenson.