1 . One billion teenagers and young adults around the world risk losing their hearing by listening to loud music, according to the World Health Organization. The U. N. agency is asking young people to turn down the volume（音量） to prevent great damage to their hearing.

Many people believe the sound being louder is better if they are listening to rock and roll. But experiencing really loud music, even really good music, can have a serious effect on the hearing.

Studies in middle- and high-income countries show nearly 50 percent of teenagers and young adults aged 12 to 35 listen to unsafe levels of sound. They are listening on their personal audio devices as well as at concerts, nightclubs and other entertainment places.

But what is an unsafe level of sound?

The WHO says there can be many kinds of unsafe levels of sound. It depends on how loud the sound is and how long you listen to it. Unsafe levels of sound can mean noise levels of 85 decibels（分贝） for eight hours a day or 100 decibels for just 15 minutes.

Doctors say there are simple measures to protect people from unsafe sound levels. Young people who wear earplugs（耳塞） during concerts can enjoy music at 90 decibels as much as they can at 110 decibels. But they admit that earplugs may not look very cool. A common sense suggestion is to turn down the volume on their personal audio devices. The WHO also advises young people to limit their use of such devices to less than one hour a day. It reminds people to use their technology to stay safe. Smartphone apps can help t monitor safe listening levels.

The U. N. agency estimates 360 million people suffer hearing loss linked to many causes, including noise, genetic conditions, infectious diseases and aging. It notes half of all cases of hearing loss are avoidable.

1. What’s the purpose of the passage?

A．To advise good music.

B．To advise people to wear carplugs.

C．To give tips on how to enjoy loud music.

D．To remind people to prevent hearing loss.

2. The underlined words “unsafe levels of sound” can refer to ______.

A．how loud the sound is

B．how long you listen to the music

C．loud music at 90 decibels

D．noise at 100 decibels for 150 minutes

3. What can we learn from the passage?

A．One billion young people risk hearing loss from loud music.

B．Smartphones can do harm to people’s hearing.

C．Don’t wear earplugs during concerts.

D．Louder music is good music.

4. What’s the main idea of the last but one paragraph?

A．There are many factors that cause hearing loss.

B．Some measures to protect people’s hearing.

C．Not all cases of hearing loss are avoidable.

D．The reason why people wear earplugs during concerts.

2 . Nowadays, more and more students are suffering from myopia (近视), or near-sightedness. It is always advise to seek a doctor to fix your condition. Here are a few tips on how to prevent it.

1. Eat green leafy vegetables.

Maybe you’re not a fan of greens.     1     Green leafy vegetables, just like carrots, contains lutein (叶黄素), which is important to your eyes. It lowers the risk of light-caused damage and provides huge health benefits to your body.

2.     2    

Your eyes and facial muscles also deserve a good rest. For every 20 minutes of staring at a screen or reading something, you need to look 20 feet away from you for a period of 20 seconds. Exercise should also be practiced on those of your eyes.     3    

3. Drink water.

What water can’t do? It keeps your mind and body working well.     4     According to experts, the most common eye complaint is linked to dry eye and its symptoms.

4. Get outside.

    5     This will decrease the aching in the muscles around eyes. A study made last 2014 suggests that the risk of near-sightedness in children reduces about 2% with each extra hour spent outside on a weekly basis.

A．Create a daily routine for yourself.

B．Rest your eyes and facial muscles regularly.

C．Drinking a lot of water keeps your eyes from drying out.

D．It helps your eyes in adjusting to daylight and far distances.

E．However, research shows that playing video games helps improve a good eyesight.

F．But start to be one if you want to protect your beautiful eyes and make it last a lifetime.

G．Moving your eyes from top to bottom, side to side or even circling it around is enough to improve your eyesight.

3 . You carry 1.3 kg fatty substances in your head that controls everything you will ever do. This fantastic control center lets you think, learn, create, and feel emotions. It also controls everything your body does. What is this amazing machine? It’s your brain — a structure so amazing that the famous scientist James Watson called it “the most complex thing we have yet discovered in our universe”.

Imagine your cat jumps onto the kitchen counter, and is about to step onto a hot stove. You would have only few seconds to act. In situations like this, your brain reads the signals from your eyes and quickly calculates when, where and at what speed you need to run to save her. Then it tells your muscles to move. No computer can match your brain’s great ability to download, process, and react to the flood of information from your eyes, ears and other sensory organs.

If a bee lands on your foot, sensory neurons (感觉神经元) in your skin send this information to your brain at a speed of more than 240 kilometers per hour. Your brain then uses motor neurons (运动神经元) to send a message back to your foot: Shake the bee off quickly! Motor neurons can send this information at more than 320 kilometers per hour!

Your brain has about 100 billion tiny cells: neurons — it would take you more than 3,000 years if you tried to count them all. Whenever you dream, laugh, think, see or move, tiny chemical and electrical signals are racing between these neurons along billions of tiny neuron pathways. Believe it or not, the activity in your brain never stops. Countless messages fly around inside it every second, like a super-fast game of table tennis. Your neurons create and send more messages than all the phones in the entire world. And although a single neuron produces only a tiny amount of electricity, all your neurons together can produce enough electricity to power a light bulb.

1. What does “the most complex thing” mean?

A．A supercomputer.	B．The universe.
C．Human brains.	D．Our emotions.

2. What can we know from the passage?

A．Brains can download more information than any computer.

B．The cat plays an important role in testing human brainpower.

C．Motor neurons in human brains serve to send countless messages.

D．Your brains can use neurons to send messages back faster than bees’.

3. The author mentions “to power a light bulb” in Para. 4 to show ________.

A．neurons can send lots of messages

B．how many active tiny cells the brain have

C．how much electricity the brain can produce

D．there is countless information in the brain

4. What is the main idea of the passage?

A．The powerful brain is a wonderful machine.

B．Brains work well in controlling body movements.

C．The brain is the most complex structure in the universe.

D．Human brains are made up of numerous neurons.

4 . Some people don't wish to waste even a second at work. Looking at a computer screen for a long time can cause stress on one's eyes. Sitting and looking at a television screen for hours can also make the eyes tired.

Bookworms love reading and they will make sure they read much more than their bodies can deal with. The strong wish to finish a book may result in fast reading，without taking breaks, which can lead to tired eyes. Reading for a long time in weak light can also cause tired eyes.

More salt-based junk food like burgers，pizzas, etc. and less water also play a role in causing tired eyes. The junk food is a reason for tired eyes for it hasn't enough vitamins（维生素）.

Less sleep causes the eyes to become heavy. Dark circles also develop if one doesn't get enough sleep over a period of time.

If not treated in time，the condition can become worse. Here are some ways to relieve（减轻）a tired eye condition.

Every hour during your day at work, spend a minute relaxing your eyes. Look away from your computer screen and roll your eyes in all directions. Try and blink（眨眼）more often. Look around the room or close your eyes for a minute if you want and then work again. Following these every hour will help relieve the stress on your eyes，and you won't feel so tired after work.

Tea helps relieve tired eyes. Make a cup of hot black tea and pour it into a glass. Hold the glass close to your eyes，so that the vapors from the tea reach your eyes. This will also make you feel fresh.

If your eyes feel very tired at work, go to the washroom and wash your face with cool tap water. The cold water will help relieve the tired feeling. Do this every hour during work and your eyes will feel good.

1. How many factors will cause the tiredness of one's eyes according to the passage?

A．6	B．4
C．8	D．10

2. In the last paragraph, what method does the author suggest to relieve your eyes?

A．A physical approach.	B．A medicine treatment.
C．An operation.	D．An exercise method.

3. What's the purpose of the passage？

A．To show the importance of our eyes.

B．To explain the ways of eyes' protection.

C．To help us keep fit.

D．To tell us how to get rid of eyes' tiredness.

4. Where can you possibly see the passage？

A．A poster.	B．A travel guide.
C．A health magazine.	D．An introduction to an eye hospital.

5 . The book A Big Fat Crisis: The Hidden Forces Behind the Obesity Epidemic (频率突增)—and How We Can End It by Deborah Cohen, a senior natural scientist, is very popular now.     1     But according to this book, the following are some misunderstandings of obesity or being overweight.

1.If you’re obese, blame your genes.

    2     Between 1980 and 2000, the number of Americans who are obese has doubled—too quickly for genetic factors to be responsible. At restaurants, a dollar puts more calories on our plates than ever before, because restaurant meals usually have more calories than what we prepare at home, so people who eat out more frequently have higher rates of obesity than those who eat out less.

2.If you’re obese, you lack self-control.

Research shows that if we are faced with too much information, we have a tendency to make poor choices on diet.     3     Even the most vigilant (警觉的) people may not be good controllers of themselves.

3.    4    

Although the US Department of Agriculture estimates that fewer than 5 percent of Americans live in the “food deserts”, and that about 65 percent of the nation’s population are obese. For most of us, obesity is not related to access to more fresh fruits and vegetables, but to the choices we make in supermarkets.

4.The problem is not that we eat too much, but that we don’t exercise.

Michelle Obama’s “Let’s Move” campaign is based on the idea that if kids exercise more, childhood obesity rates will decrease.     5     In fact, although a drop in work-related physical activity may explain up to 100 fewer calories burned, leisure physical activity appears to have increased.

A．Obesity rates have increased.

B．People hold different views on obesity.

C．People benefit a lot from physical activity.

D．Lack of access to fresh fruits and vegetables is a cause of obesity.

E．Fresh fruits and vegetables we choose in a supermarket are related to obesity.

F．But there was no obvious decrease in physical activity levels as obesity rates climbed in the 1980s and 1990s.

G．Our world has become so rich in food that we can be led to consume too much in ways we can’t understand.

6 . Take care of your spine（脊柱）

The spine stands at the center of your health, providing your body with structure and support. It also contains your spine cord, a massive collection of nerves conveying electric signals from the rest of your body to your brain    1    

Maintaining good posture( 姿势) is one of the most important things you can do to keep your spine healthy. Proper posture means standing or sitting while keeping your spine straight, except for its natural curves. Posture comes into play even when you are asleep. Sleeping on your side puts less stress on your spine than most other positions.     2     . Especially if you work at a desk most of the day, it's important to get up and stretch regularly.

    3    Stretch can help the muscles around your spine relax and allow bones to shift into better arrangement. Strength exercises like pushups(俯卧撑) can also help by strengthening the muscles around your spine. However, don’t overdo the exercise, as repeated motions can strain the muscles around your spine.

Finally, your diet affects the health of your spine because many vitamins are necessary for bones and nerves. In particular, vitamins B and D are essential to keep bones healthy, so you may want to consider taking a supplement.    4    , so it is also helpful to do some of the back exercise outside.

Many of the actions necessary to keep your spine healthy are identical to those used to preserve your health in other ways.    5    

A．However, the latter is also absorbed from sunlight.

B．Staying still for too long can be hard on your back.

C．So protect your back, the rest of the body will benefit.

D．Protecting your spine with yoga is also a necessary step.

E．Try the following exercises to keep your spine more flexible.

F．Exercise is also an important factor in the health of your spine.

G．So you should take the following factors into account to have a healthy spine.

7 . Bad teeth may be painful and it’s getting worse without treatment. They can even ruin your life. Illness of the teeth can find its way into the blood system. This can increase the chances of a heart disease or other illnesses.

Experts say good care for teeth should start at birth. Mothers’ milk is the best food for the healthy development of teeth.

But dentists say a baby’s mouth and early teeth should he cleaned after each feeding. Use a cloth with a little warm water. Do the same if a baby is fed with a bottle. Experts say if you decide to put your baby to sleep with a bottle, give him only water.

When a baby’s teeth begin to appear, you can clean them with a wet toothbrush. Dentists say it is important to find soil toothbrushes made especially for babies and to use them very gently. Young children often eat toothpaste (牙膏) when they brush their teeth, so they should be carefully watched when they brush their teeth.

Parents often ask what effect thumb sucking (吮拇指) might have on their baby’s teeth. Experts generally agree that this is fine early in life. Most children stop sucking their thumbs by the age of four. If it continues, parents should talk to their children’s dentists or doctors.

Dentists say children should have their first dental visit by the time they are one year old. They say babies should be examined when their first teeth appear, usually at around six months.

1. People should pay attention to teeth problems because _________.

A．they will bring bad luck

B．they will bring the family much trouble

C．they usually last a long time

D．they can cause other illnesses

2. According to the writer, a baby’s teeth should be protected from the day ________.

A．he begins to speak

B．he was born

C．he has his first tooth

D．he is fed with a bottle

3. We can learn from the passage that ________.

A．children’s toothbrushes are always expensive

B．children are not advised to brush their teeth

C．drinking water is better than milk before sleeping

D．thumb sucking is common for kids

4. The underlined word “it” in Paragraph 5 refers to “________”.

A．thumb sucking	B．toothache
C．parents’ trouble	D．experts’ advice

8 . When we can see well, we do not think about our eyes often. It is only when we can not see perfectly that we come to see how important our eyes are.

People who are nearsighted can only see things that are very close to their eyes. Many people who do a lot of close work, such as writing and reading, become nearsighted. Then they have to wear glasses in order to see distant things clearly.

People who are farsighted face just the opposite problem. They can see things that are far away, but they have difficulty reading a book unless they hold it at arm’s length. If they want to do much reading, they must get glasses too.

Other people do not see clearly because their eyes are not exactly the right shape. This, too, can be corrected by glasses. Some people’s eyes become cloudy because of cataracts. Long ago these people often became blind. Now, however, it is possible to operate on the cataracts and remove them.

When night falls, colors become fainter to the eyes and finally disappear. After your eyes have grown used to the dark, you can see better if you use the side of your eyes rather than the centers. Sometimes, after dark, you see a small thing to one side of you, which seems to disappear if you turn your head in its direction. This is because when you turn your head, you are looking at the thing too directly. Men on guard duty sometimes think they see something moving to one side of them. When they turn to look straight at it, they can not see it any more, and they believe they were mistaken. However, this mistake happens because the center of the eye, which is very sensitive in daylight, is not as sensitive as the sides of the eye after dark.

1. We don’t know that our eyes are of great importance until ________.

A．we think about our eyes

B．we cannot see clearly

C．we wear glasses

D．we have to do much reading

2. According to the passage, a ________ is more likely to be nearsighted.

A．tailor	B．doctor
C．guard	D．painter

3. People who are farsighted ________.

A．can only do a lot of close work without glasses

B．can only see things that are very close to their eyes

C．have difficulty reading a book if they hold it at arm’s length

D．have the same problem as the nearsighted people

9 . Crossing your legs is an extremely common habit. While you may find it comfortable to sit with one knee crossed over the other, it might be causing health problems that you are not aware of.

A study published in Blood Pressure Monitoring stated that sitting with your legs crossed can increase your blood pressure. The reason this happens is because the blood in your legs has to work against gravity to be pumped back to your heart, crossing one leg over the other increases resistance, making it even harder for the blood to circulate. You won’t feel any immediate effects, but sitting for long periods of time will hurt you forever.

Crossing your legs can also lead to neck and back pain. Ideally, it’s best for our bodies to sit with our feet planted flat, hip width apart, on the floor, but it’s not easy to maintain perfect posture all day at the office. When you sit with your legs crossed your hips are in a twisted position, which can cause one of your pelvic bones(骨盆) to rotate. Since your pelvic bone supports your neck and spine（脊椎）, this can cause pressure on your lower and middle back and neck.

You also might notice that when you sit with your legs crossed for long periods of time your feet and legs get painful or have the feeling of being asleep. This is because when one leg sits on top of the other it causes pressure on the veins（静脉） and nerves in your legs and feet. It can cause numbness and/or temporary paralysis in the legs, ankles, or feet. While the feeling of discomfort may only last a minute or two, repeatedly crossing your legs until they feel numb can cause permanent nerve damage.

So next time you sit down, try to get yourself in the habit of sitting with both of your feet on the floor. Not only will it help your posture and stability, but it will also save your health in the long run.

1. Which of the following is not the consequence of crossing legs?

A．Neck and back get hurt.

B．Feet and legs become numb.

C．Blood pressure goes up.

D．Pelvic bones keep perfect postures.

2. What does the underlined word “rotate” in Para3 mean?

A．break seriously

B．hurt greatly

C．move casually

D．straighten suddenly

3. What does the text mainly talk about?

A．How to choose a proper sitting posture

B．It is advisable not to sit with legs crossed

C．How to develop beneficial habits

D．Blood pressure harms our bodies.

10 . Eye Health Care Daily

Healthy habits mean healthy eyes. Here are some daily tips for eye health.

◆Clean your eyes with pure cold water regularly. This is one of the best ways to keep eyes healthy and disease free.

◆Avoid looking directly at the sun.

◆Roll your eyes up and down, then side to side. Then move your eyes in a circular motion (圆周运动). Exercise 5 to 10 times a day to relax your eyes.

◆ Keep a good distance from the computer screen-sit about 22-28 inches away from it.

◆Visit your eye doctor on a regular basis.

There are also some tips for healthy contact lens (隐形眼镜) wear and care to help prevent eye infections (感染). Please visit CDCS healthy contact lenses website and you can also follow them on social media (www.cdc.goy/contactlenses).

1. _____is not good for your eyes.

A．Eating vegetables	B．Wearing sunglasses
C．Wearing contact lens	D．Looking at the sun directly

2. How to relax your eyes according to the tips?

A．Clean eyes with pure cold water.	B．Look at the sun directly.
C．Make eye movements.	D．Wear contact lens.

3. In which column can we read this text?

A．Education.	B．Health.
C．Entertainment.	D．Advertisement.