1 . Much information can be conveyed, purely through our eyes, so the expression “eyes also talk” is often heard.

Can you recall any experience that further proves this statement? On a bus you may quickly glance at a stranger, but not make eye contact. If he senses that he is being stared at, he may feel uncomfortable.

It is the same in daily life. If you are stared at for more than necessary, you will look at yourself up and down to see if there is anything wrong with you. If nothing goes wrong, you will feel angry about other's staring at you that way. Eyes do convey information, right？

Looking too long at someone may seem to be rude and aggressive. But things are different when it comes to staring at the opposite sex. If a man looks at a woman for more than 10 seconds and refuses to turn away his gaze, his intentions are obvious. That is, he wishes to attract her attention, to make her understand that he is showing affection for her.

However, the normal eye contact for two people engaged in conversation is that the speaker will only look at the listener from time to time, in order to make sure that the listener does pay attention to what the former is speaking, to tell him that he is attentive.

If a speaker looks at you continuously when speaking, as if he tries to control you, you will feel uneasy. A poor liar usually exposes himself by looking too long at the victim, since he believes the false idea that to look straight in the eye is a sign of honest communication.

In fact, continuous eye contact happens between lovers only, who will enjoy looking at each other tenderly for a long time, to show love that words cannot express.

Evidently, eye contact should be done according to the relationship between two people and the specific situation.

1. What may a person usually do on a bus?

A．Glance at a stranger with eye contact.	B．Use eyes to talk to a stranger politely.
C．Glance at a stranger without eye contact.	D．Talk to a stranger politely after a quick glance.

2. Why is a poor liar easy to be seen through?

A．He thinks that he is honest.	B．He wants to control the victim.
C．He feels uneasy about others’ eye contact.	D．He looks straight at the victim for too long a time.

3. What does it mean if a man looks at a woman for over 10 seconds?

A．He likes her eyes.	B．He admires her.
C．He knows her well.	D．He makes contact with her.

4. What's the best title of the passage?

A．Eyes Can Also “Talk”	B．How to Make Eye Contact
C．Different Ways of Expressing Thoughts	D．The Importance of Body Language

2 . Below is a selection from a popular science book.

If blood is red, why are veins (静脉) blue?

Actually, veins are not blue at all. They are more of a clear, yellowish color. Although blood looks red when it’s outside the body, when it’s sitting in a vein near the surface of the skin, it’s more of a dark reddish purple color. At the right depth, these blood-filled veins reflect less red light than the surrounding skin, making them look blue by comparison.

Which works harder, your heart or your brain?

That kind of depends on whether you’re busy thinking or busy exercising. Your heart works up to three times harder during exercise, and shifts enough blood over a lifetime to fill a supertanker (超级油轮). But, in the long run, your brain probably tips it, because even when you’re sitting still your brain is using twice as much energy as your heart, and it takes four to five times as much blood to feed it.

Why do teeth fall out, and why don’t they grow back in grown-ups?

Baby (or “milk”) teeth do not last long; they fall out to make bigger room for bigger, stronger adult teeth later on. Adult teeth fall out when they become damaged, decayed (腐烂) and infected by bacteria. Once this second set of teeth has grown in, you’re done. When they’re gone, they are gone. This is because nature figures you’re set for life, and what controls regrowth of your teeth switches off.

Do old people shrink (收缩) as they age?

Yes and no. Many people do get shorter as they age. But, when they do, it isn’t because they’re shrinking all over. They simply lose height as their spine (脊柱) becomes shorter and more curved due to disuse and the effect of gravity (重力). Many (but not all) men and women do lose height as they get older. Men lose an average of 3-4 cm in height as they age, while women may lose 5 cm or more. If you live to be 200 years old, would you keep shrinking till you were, like 60 cm tall, like a little boy again? No, because old people don’t really shrink! It is not that they are growing backwards—their legs, arms and backbones getting shorter. When they do get shorter, it’s because the spine has shortened a little. Or, more often, become more bent and curved.

Why does spinning make you dizzy?

Because your brain gets confused between what you’re seeing and what you’re feeling. The brain senses that you’re spinning using special gravity-and-motion-sensing organs in your inner ear, which work together with your eyes to keep your vision balance stable. But when you suddenly stop spinning the system goes out of control, and your brain thinks you’re moving while you’re not.

Where do feelings and emotions come from?

Mostly from an ancient part of the brain called the limbic system (边缘系统). All mammals have this brain area—from mice to dogs, cats, and humans. So all mammals feel basic emotions like fear, pain and pleasure. But since human feelings also involve other, newer bits of the brain, we feel more complex emotions than any other animal on this planet.

If exercise wears you out, how can it be good for you?
1. What is the color of blood in a vein near the surface of the skin?

A．Blue.	B．Light yellow.
C．Red.	D．Dark reddish purple.

2. Why do some old people look a little shrunken as they age?

A．Because their spine is in active use.

B．Because they are more easily affected by gravity.

C．Because they keep growing backwards.

D．Because their spine becomes more bent.

3. Which of the following statements about our brain is true?

A．In the long run, our brain probably works harder than our heart.

B．When our brain senses the spinning, we will feel dizzy.

C．The brains of the other mammals are as complex as those of humans.

D．Our feelings and emotions come from the most developed area in our brain.

4. What is the main purpose of the selection?

A．To give advice on how to stay healthy.

B．To provide information about our body.

C．To challenge new findings in medical research.

D．To report the latest discoveries in medical science.