C. It can help to burn up calories. D. It can make bodies strong.

30. In order to prevent injuries, you should do some____________exercises.

　A. Walking B. stretching and bending C. Riding D. weighting--training

31. What is the best title for the passage?

　A. Doing Exercise B. Teenagers' Fitness

　C. Different Lifestyles D. Overweight Teenagers

　　D

　　　　　A SHORT HISTORY OF WESTERN PAINTING

Art is influenced by the customs and faith of a people. Styles in Western art have

changed many times. As there are so many different styles of Western art, it would be

impossible to describe all of them in such a short text. Consequently, this text will

describe only the most important ones. Starting from the sixth century AD.

The Middle Ages(5th to the 15th century AD)

During the Middle Ages, the main aim of painters was to represent religious

themes. A conventional artist of this period was not interested in showing nature and people as they really were. A typical picture at this time was full of religious symbols, which created a feeling of respect and love for God. But it was evident that ideas were changing in the 13th century when painters like Giotto di Bondone began to paint religious scenes in a more realistic way.

The Renaissance(15th to 16th century)

During the Renaissance, new ideas and values gradually replaced those held in the Middle Ages. People began to concentrate less on religious themes and adopt a more humanistic attitude to life.At the same time painters returned to classical Roman and Greek ideas about art. They tried to paint people and nature as they really were. Rich people wanted to possess their own paintings, so they could decorate their superb palaces and great houses. They paid famous artists to paint pictures of themselves, their houses and possessions as well as their activities and achievements.

One of the most important discoveries during this period was how to draw things in perspective. This technique was first used by Masaccio in 1428. When people first saw his paintings, they were convinced that they were looking through a hole in a wall at a real scene. If the rules of perspective had not been discovered, no one would have been able to paint such realistic pictures. By coincidence,oil paints were also developed at this time, which made the colors used in paintings look richer and deeper. Without the new paints and the new technique, we would not be able to see the many great masterpieces for which this period is famous.

Impressionism(late 19h to early 20th century)

In the late 19th century, Europe changed a great deal,from a mostly agricultural society to a mostly industrial one. Many people moved from the countryside to the new cities. There were many new inventions and social changes also led to new painting styles. Among the painters who broke away from the traditional style of painting were the Impressionists, who lived and worked in Paris.

The Impressionists were the first painters to work outdoors. They were eager to show how light and shadow fell on objects at different times of day. However, because natural light changes so quickly, the Impressionists had to paint quickly. Their paintings were not as detailed as those of earlier painters. At first, many people disliked this style of painting and became very angry about it. They said that the painters were careless and their paintings were ridiculous.

Modern Art(29th century to today)