eating when they feel full. However, Americans tend to stop when their plate is empty or their favorite TV show is over.

According to Dr. Joseph Mercola, a health expert, the French see eating as an important part of their life style. They enjoy food and therefore spend a fairly long time at the table, while Americans see eating as something to be squeezed between the other daily activities. Mercola believes Americans lose the ability to sense when they are actually full. So they keep eating long after the French would have stopped. In addition, he points out that Americans drive to huge supermarkets to buy canned and frozen foods for the week. The French, instead, tend to shop daily, walking to small shops and farmers' markets where they have a choice of fresh fruits, vegetables, and eggs as well as high-quality meats for each meal.

After a visit to the United States, Mireille Guiliano, author of French Women Don't Get Fat, decided to write about the importance of knowing when to stop rather than suggesting how to avoid food. Today she continues to stay slim and rarely goes to the gym.

In spite of all these differences, evidence shows that recent life style changes may be affecting French eating habits. Today the rate of obesity - or extreme overweight - among adults is only 6%. However, as American fast food gains acceptance and the young reject older traditions, the obesity rate among French children has reached 17% - and is growing.

28. In what way are the French different from Americans according to Dr. Joseph Mercola?

A. They go shopping at supermarkets more frequently.

B. They squeeze eating between the other daily activities.

C. They regard eating as a key part of their life style.

D. They usually eat too much canned and frozen food.

29. This text is mainly the relationship between _________.

A. Americans and the French B. life style and obesity

C. children and adults D. fast food and overweight

30. The text is mainly developed __________.

A. by contrast B. by space C. by process D. by classification

31. Where does this text probably come from?

A. A TV interview B. A food advertisement

C. A health report D. A book review

　　　　　　　　　　　　　　　　　　D

Held around August 10th, Nagqu Horse Racing Festival is the most important in north Tibet. In the golden season of grassland, tens of thousands of herdsmen from different parts of Tibet, in their holiday best, come to Nagqu on their horses with different kinds of goods and materials. They pitch tents in the southern part of Nagqu town. During the festival, thousands of tents with paintings of all kinds of Buddhas will be set up in the area, stretching miles." It makes the grassland look like a small town.

On the day for the opening ceremony of the festival, people from all over Tibet will pour into this grassland. Colorful flags are flying against the blue sky; horses are racing, herdsmen are showing their riding skills; some are dancing. People around the "tent town' will be cooking and drinking. This is really a lively picture that you should not miss.

After the opening ceremony, the recreational and trade activities will start, such as horse races, carrying rocks, and performing Tibetan operas. All together，these activities will last 3 to 7 days.

The horse racing festival has a long history. It dates from the ancient military review in the Tubo tribe in the area. It is also the traditional occasion for horse trade. The buying and selling of horses at these fairs attracts Tibetans from near and far. Nowadays, the local government also attaches great importance to the occasion and considers it a good chance to help the economic development in the area. Business talks are held and modern activities like fashion shows can also be seen there. It has become a bright part in the tourism of Tibet.

32. The underlined word "pitch in Paragraph 1 most probably means______.

A. put up B. take apart C. turn out D. look over