Winter in the north is usually very cold and it is important to avoid colder-related injuries such as frostbite(冻伤) and hypothermia(体温降低)．Frostbite is damage that happens when skin is exposed to extreme cold for too long．It mainly happens on the hands，feet，nose，and ears and some will bring permanent damage．Hypothermia is a serious medical condition caused by serious cold．It happens when the body cannot produce as much heat as it loses．If not treated，it can be deadly．
The best way to avoid cold-related injuries is to be prepared for the outdoors．Here is a simple way to remember four basic steps to staying warm．Think of COLD．
The C stands for cover．Wear a hat and scarf to keep heat from escaping through the head，neck，and ears．And wear mittens instead of gloves．Mittens are a type of glove that does not have separate parts for each finger．Gloves may not keep hands as warm because they separate the fingers．
The O stands for overexertion(过分用力)．Avoid activities that will make you sweaty．Wet clothes and cold weather are a bad mix．
L is for layers．Wearing loose，lightweight clothes，one layer on top of another, is better than single heavy layer clothing．Also，make sure outerwear is made of water resistant and tightly knit material．
The last letter D stands for dry．In other words，stay as dry as possible．Pay attention to the places where snow can enter, like the tops of boots．the necks of coats and the wrist areas of mittens．
And there are a couple of other things to keep in mind，one for children and the other for adults．Eating snow might be fun but it lowers the body's temperature．And drinking alcohol might make a person feel warm，but what it really does is weaken the body's ability to hold heat．
67．Both frostbite and hypothermia        ．
A．are injuries caused by extreme cold
B．may happen on the hands，feet，nose and ears
C．may cause uncontrollable shaking and slow breathing
D．may be deadly injuries
68．Mittens can keep your hands warmer than gloves because           ．
A．they are thicker                     B．they are made of better materials
C．they don't separate your fingers        D．they separate your fingers
69．      can help you avoid cold-related injuries．
A．Trying your best to exercise until you get sweat
B．Wearing layers of loose，lightweight clothes
C．Drinking alcohol to make you feel warm
D．Wearing a single heavy layer of clothing
70．Overexertion should be avoided because         ．
A．it may exhaust you       B．it may make you hungry
C．it may make you sweat     D．it may lower your body temperature

Babies born in summer are more likely to become short-sighted in late life, a study has shown.

As many as a quarter of all cases of short-sightedness are caused by too great an exposure to sunlight in the first weeks of life, say eye experts.

They are advising all parents to put sunglasses on their babies during the first weeks.

Scientists had already established that over-exposure to sunlight caused shortsightedness in animals.

Researchers who compared the months in which babies were born with whether they needed glasses later on say the principle also applies to humans.

A study of almost 300,000 young adults-the largest of its kind-showed that those born in June and July had a 25 per cent greater chance of becoming severely short-sighted than those born in December or January.

Research leader Professor Michael Belkin, of Tel Aviv University, said it was because prolonged illumination(光照) causes the eyeball to lengthen-causing short-sightedness.

Hence the more light a newborn is exposed to, the more the eyeball lengthens and the worse the short-sightedness will be.

The mechanism which lengthens the eyeball is associated with levels of melatonin(褪黑激素), a pigment (色素) which protects the skin against harmful rays of the sun.

In young babies not enough melatonin is released as protection, meaning they are more vulnerable to sunburn and changes to eyeball shape.

Sight expert Professor Daniel O’Leary, of Anglia Ruskin University in Cambridge, said “At the moment we don’t know the precise cause of why light exposure affects sight, but the evidence seems to prove that it is one of the reasons for people becoming shortsighted.”

67. Babies born in summer are more likely to be shortsighted ____________.

A. because the summer sun is too strong for babies

B. because babies born in summer have lengthened eyeballs

C. if they are exposed to much sunlight in the first weeks after they are born

D. if parents don’t know a proper way to protect their babies’ eyes

68. Melatonin is a kind of material to ___________.

A. prevent the eyes from becoming near-sighted

B. protect the skin from harmful sun rays

C. make our body strong

D. protect babies’ eyes from summer sun

69.From what Professor Daniel O’Leary says we can conclude that ___________.

A. there is no evidence that shortsightedness is related to exposure to sunlight

B. whether light exposure affects sight still needs to be further proved

C. he believes that light exposure can cause shortsightedness

D. he tries to give the cause of why light exposure affects sight

70.The underlined word “vulnerable” in the passage probably means __________.

A. easy to be harmed                         B. resistant

C. protective                               D. changeable

Malaria, the world's most widespread parasitic (寄生虫引起的)disease, kills as many as three million people every year ---- almost all of whom are under five, very poor, and African. In most years, more than five hundred million cases of illness result from the disease, although exact numbers are difficult to assess because many people don't (or can't) seek care. It is not unusual for a family earning less than two hundred dollars a year to spend a quarter of its income on malaria treatment, and what they often get no longer works. In countries like Tanzania, Mozambique, and the Gambia, no family, village, hospital, or workplace can remain unaffected for long.        

Malaria starts suddenly, with violent chills, which are soon followed by an intense fever and, often, headaches. As the parasites multiply, they take over the entire body. Malaria parasites live by eating the red blood cells they infect (感染) .They can also attach themselves to blood vessels in the brain. If it doesn't kill you, malaria can happen again and again for years. The disease is passed on to humans by female mosquitoes infected with one of four species of a parasite. Together, the mosquito and the parasite are the most deadly couple in the history of the earth and one of the most successful. Malaria has five thousand genes, and its ability to change rapidly to defend itself and resist new drugs has made it nearly impossible to control. Studies show that mosquitoes are passing on the virus more frequently, and there are more outbreaks in cities with large populations. Some of the disease's spread is due to global warming.

For decades, the first-choice treatment for malaria parasites in Africa has been chloroquine, a chemical which is very cheap and easy to make. Unfortunately, in most parts of the world, malaria parasites have become resistant to it. Successful alternatives that help prevent resistance are already available, but they have been in short supply and are very expensive. If these drugs should fail, nobody knows what would come next.

1. According to paragraph 1, many people don't seek care because ___________.

A. they are too poor                                       

B. it is unusual to seek care

C. they can remain unaffected for long

D. there are too many people suffering from the disease

2. People suffering from malaria _____________.

A. have to kill female mosquitoes       B. have ability to defend parasites

C. have their red blood cells infected  D. have sudden fever, followed by chills

3. Which of the following may be the reason for the wide spread of the disease?

A. Its resistance to global warming.   

B. Its ability to pass on the virus frequently.

C. Its outbreaks in cities with large populations.

D. Its ability to defend itself and resist new drugs.

4. It can be inferred from the passage that _____________.

A. no drugs have been found to treat the disease

B. the alternative treatment is not easily available to most people

C. malaria has developed its ability to resist parasites

D. nobody knows what will be the drug to treat the disease

5. Which of the following questions has NOT been discussed in the passage?

A. How can we know one is suffering from malaria?

B. How many people are killed by malaria each year?

C. Why are there so many people suffering from malaria?

D. What has been done to keep people unaffected for long?

Winter in the north is usually very cold and it is important to avoid colder-related injuries such as frostbite(冻伤) and hypothermia(体温降低)．Frostbite is damage that happens when skin is exposed to extreme cold for too long．It mainly happens on the hands，feet，nose，and ears and some will bring permanent damage．Hypothermia is a serious medical condition caused by serious cold．It happens when the body cannot produce as much heat as it loses．If not treated，it can be deadly．

The best way to avoid cold-related injuries is to be prepared for the outdoors．Here is a simple way to remember four basic steps to staying warm．Think of COLD．

The C stands for cover．Wear a hat and scarf to keep heat from escaping through the head，neck，and ears．And wear mittens instead of gloves．Mittens are a type of glove that does not have separate parts for each finger．Gloves may not keep hands as warm because they separate the fingers．

The O stands for overexertion(过分用力)．Avoid activities that will make you sweaty．Wet clothes and cold weather are a bad mix．

L is for layers．Wearing loose，lightweight clothes，one layer on top of another, is better than single heavy layer clothing．Also，make sure outerwear is made of water resistant and tightly knit material．

The last letter D stands for dry．In other words，stay as dry as possible．Pay attention to the places where snow can enter, like the tops of boots．the necks of coats and the wrist areas of mittens．

And there are a couple of other things to keep in mind，one for children and the other for adults．Eating snow might be fun but it lowers the body's temperature．And drinking alcohol might make a person feel warm，but what it really does is weaken the body's ability to hold heat．

67．Both frostbite and hypothermia        ．

A．are injuries caused by extreme cold

B．may happen on the hands，feet，nose and ears

C．may cause uncontrollable shaking and slow breathing

D．may be deadly injuries

68．Mittens can keep your hands warmer than gloves because           ．

A．they are thicker                     B．they are made of better materials

C．they don't separate your fingers        D．they separate your fingers

69．      can help you avoid cold-related injuries．

A．Trying your best to exercise until you get sweat

B．Wearing layers of loose，lightweight clothes

C．Drinking alcohol to make you feel warm

D．Wearing a single heavy layer of clothing

70．Overexertion should be avoided because         ．

A．it may exhaust you       B．it may make you hungry

C．it may make you sweat     D．it may lower your body temperature

Directions: For each blank in the following passage there are four words or phrases marked A, B, C and D. Fill in each blank with the word or phrase that best fits the context.

Who buy the presents? How much should we spend? Questions about money like these ___50___ during the holidays, and they can turn this wonderful season into the most ___51___ time of the year.

The ___52___ cause of holiday stress is money issues, according to a recent poll by the American Psychological Association (APA). The survey found that 61 percent of Americans ___53___ lack of money as the top cause of family tensions, holiday blues and depression.

“People believe that they can go out and buy gifts because it’s the holidays, ___54___they can’t afford to do so,” says Dorothy Cantor, a noted psychologist and former APA president. “Not only is it stressful to feel that you have to buy everyone an expensive gift, but you will also be stressed for the rest of the year trying to pay your ___55___. You can show love and caring by giving something that you know is meaningful and ___56___ that doesn’t have to cost a lot.”

While managing money issues during the holiday season can be a ___57___, financial experts agree that you can ___58___ pressure by planning ahead, exhibiting patience and managing expectations to make the holiday season enjoyable and worry-free.

For starters, make an agreement with family members to discuss holiday spending and finances before you make any ___59___. The goal here is to learn one another’s thoughts and feelings about priorities and wishes. Be realistic, decide together on a budget and only use cash, rather than using credit cards. Avoid getting ___60___ unreasonable expectations. It makes no ___61___ to buy gifts you can not afford and put additional financial and emotional stress on yourself and your family that will cause problems long after the holidays are over.

Other ways to ___62___ the burden of money-related holiday blues include an understanding that everyone faces money problems at one time or another. It’s important to keep your ___63___ situation in perspective, to learn from experience and then to proceed with your life.

And lastly, make focusing on financial solutions a part of your New Year’s resolution. It’s the perfect time to take a __64___ approach by doing some soul-searching, forgiving yourself, letting go of the past and dealing with your financial problems in a businesslike manner each day.

3.  

4.  

5.  

7.A. resistant       B. random           C. personal     D profitable

12.  

14.