26. How does the organizer keep yoinformed of the latest information?

A. By radio. B. By E-mail. C. By phone. D. By post.

C

A recent experiment held in Japan shows that it is almost impossible for people to walk exactly straight for 60 metres. Tokyo University of Agriculture and Technology found 20 healthy men and asked them to walk as straight as possible to a target 60 metres away at normal speed. Each man had to walk on white paper fixed flat to the floor wearing wet colored socks. The footprints revealed that all walked in a winding rather than a straight line. Researchers found that people readjust (再调整) the direction of walking every few seconds. The amount of the winding differed from subject to subject. This suggests that none of us can walk in a strictly straight line. We walk in a winding way mainly because of a slight structural or functional imbalance of our limbs (四肢). Although we may start walking in a straight line, several steps afterwards we have changed direction.

Eyesight helps us to correct the direction of walking and leads us to the target. Your ears also help yowalk. After turning around a lot with your eyes closed, yocan hardly stand still, let alone walk straight.

It’s all because your ears help yobalance. Inside your inner ear there is a structure which contains liquids. On the sides of the organ are many tiny hair-like structures that move around as the liquid flows. When yospin (旋转) the liquid inside also spins. The difference is that when yostop, the liquid continues to spin for a while. Dizziness (眩晕) is the result of these nerves in your ear. When yoopen your eyes, although your eyesight tells yoto walk in a straight line, your brain will trust your ears more, thus yowalk in a curved line.

27. The experiment held in Japan proved that _______.

A. the participants kept readjusting their direction of walking

B. all the participants (参与者) had a good sense of direction

C. the experiment was done in different ways

D. none of the participants finished the 60 metres

28. What helps to readjust our walking direction?

A. Limbs. B. Ears. C. Eyes. D. Footprints.

29. The underlined word “subject” in Para. 1 refers to ________.

A.a person with a functional imbalance

B.a person chosen to be studied in an experiment

C.the subject one studies at school

D.the direction of walking

30. The purpose of writing the article is to ________.

A.prove that ears can help us to walk straight

B.explain why we can hardly walk in a strictly straight line

C.point out the importance of noticing everyday science

D.tell us if we try, we can walk in a straight line

第二节(共5小题;每小题2分，满分10分)

根据短文内容，从短文后的选项中选出能填入空白处的最佳选项，选项中有两项为多余选项。

Being fit is a way of saying a person eats well, gets a lot of physical exercise, and has a healthy weight. There are a lot of discussions these days about fit kids. 31

1. Eat a variety of foods.

Yomay have a favorite food, but the best choice is to eat a variety. 32 Taste new foods and old ones yohaven’t tried for a while. Some foods, such as green vegetables, are more pleasing the older yoget. Shoot for at least five servings of fruits and vegetables a day — two fruits and three vegetables.

2. Listen to your body.

What does it feel like to be full? When you’re eating, notice how your body feels and when your stomach feels comfortably full. Sometimes, people eat too much because they don’t notice when they need to stop eating. 33 And over a period of time, overeating can lead to unhealthy weight gain.

3. 34

What’s screen time? It’s the amount of time yospend watching TV or DVDs, playing video games, and using the computer. The more time yospend on these sitting-down activities, the less time available for active stuff, like basketball, bike riding and swimming. 35

These rules aren’t magic. However, follow them most of the time and yocan become a fit kid sooner or later.

A. Limit screen time.

B. If you’re a kid who wants to be fit, here are three rules to live by.

C. Drink water and milk.

D. Ask your parents to help yodo your favorite activities regularly.

E. Eating too much can make yofeel uncomfortable.

F. If yoeat different foods, you’re more likely to get the nutrients your body needs.

G. Try to spend no more than 2 hours a day on screen time.