【推荐1】The human brain weighs about 1.4 kilograms，but it can，hold much more information than most computers.However，there is another difference between humans and computers.Computers don't forget information they are given，but humans often do.No one remembers everything，and luckily we don't usually have to.But everyone can improve their memory if they want to.Here are some suggestions.

·Try to use new information immediately.For example，if you meet someone who says 〝Hi！I'm Carlos，〞don't just say"Hello.〞Repeat the person's name.Say"〞

·Break a big number into smaller parts.For example，it's hard to memorize（记忆）109244153.But if you break it into three parts--109/244/153-it becomes easier.

·Write out what you need to remember ever and over again.This will help you keep it in mind longer，especially for memorizing formulas（公式）or facts.

·Always review information.If you bring what you've learned back to your mind，they become easier to remember.For example，before you go to sleep，it's a good idea to review the new things you learned that clay.

·Discuss with a friend.It is always easier to remember things through discussions.You can have a discussion about what's right and what's wrong，and it will lead to the right answer.

·Never tell yourself that you have a bad memory.You can always do something to help improve your memory.And everyone's memory gets better if they use it often enough.

All of the suggestions are helpful.If you follow them，you are certain to improve your memory.

1. How many suggestions are mentioned in the passage？

A．Three.	B．Four.
C．Five.	D．Six.

2. Which should be put in the blank（空格）in Paragraph 2？

A．Hello，Carlos.	B．How do you do？
C．Hello，I am Sophia.	D．Glad to meet you！

3. What can help memorize a big number more casily according to the passage？

A．To store it in a computer.	B．To break it into stunner parts.
C．To discuss it with a friend.	D．To review it before you sleep.

4. Which of the following is true according to the passage？

A．Discussing with friends can help you remember things.

B．Always reviewing information can help you fall asleep.

C．Formulas and facts can help you learn about your brain.

D．Human beings can improve their memory by computer

5. What does the sentence"Never tell yourself that you have a bad memory"mean？

A．You should tell others about your bad memory.

B．You should believe in other people all the time.

C．You should ask others to improve their memory.

D．You should be confident in your memory ability.

【推荐2】Be at your best!

What does your brain need to work well? Here are some things it needs.

Good food

Experts say that breakfast is much more important than any other meal.     1    . So don’t miss breakfast—especially before an exam! But you need to eat a good breakfast—junk food won’t work.

A regular supply of energy

Your brain needs a regular supply of energy, so you need to eat carbohydrates (碳水化合物). They’re found in bread, rice, pasta and beans.     2    . They work more quickly than bread and rice, so they give you a short burst (爆发) of energy, but afterwards you feel more tired.

A continuous supply of oxygen (氧气)

Your brain needs oxygen, which it gets from exercise.     3    . You also need a good supply of iron because iron helps your blood to carry oxygen round your body.

Water

    4    . Not getting enough water will stop your brain from working well. And remember, water isn’t as expensive as sweet drinks!

    5    

Your brain needs several hours’ sleep, so it can ‘update’ itself, just like a computer. Experts say that when you study for a test or an exam, you should get some sleep as quickly as possible after you’ve finished studying. This helps you to remember what you’ve learned.

A．A short break

B．A good night’s sleep

C．It works best in the morning.

D．Exercise improves your memory too.

E．Water is much better than sweet drinks.

F．Your brain works better when you have eaten.

G．Chocolate, biscuits and sweets are not good for your brain.

【推荐3】Bad teeth can be painful and even be deadly. Infections of the gums (牙龈) and teeth can release bacteria into the blood system. Those bacteria can increase the chance of a heart attack or stroke and worsen the effects of other diseases. And adults are not the only ones at risk. For example, a 12­-year-­old   boy died when a tooth infection spread to his brain in 2007 in Washington. Experts said it might have been prevented had he received the dental care he needed.

Experts say good dental care starts at birth. Breast milk，they say，is the best food for the healthy development of teeth. Breast milk can help slow bacterial growth and acid production in the mouth. But dentists say a baby’s gums and early teeth should be cleaned after each feeding by using a cloth with a little warm water. Experts say if you decide to put your baby to sleep with a bottle, give only water.

When baby teeth begin to appear，you can clean them with a wet toothbrush. Dentists say it is important to find soft toothbrushes made especially for babies and to use them very gently. The use of fluoride (氟化物) to protect teeth is common in many parts of the world. For example, it is often added to drinking water supplies. The fluoride mixes with enamel (釉质)，the hard surface on teeth, to help prevent holes from forming.

But young children often swallow toothpaste when they brush their teeth. The American Academy of Pediatric Dentistry notes that swallowing fluoridated toothpaste can cause problems. So young children should be carefully watched when they brush their teeth. And only a small amount of fluoridated toothpaste, the size of a pea, should be used.

Parents often wonder what effect finger sucking might have on their baby’s teeth. Dental experts generally agree that this is fine early in life. Most children stop sucking their fingers by the age of four. If it continues，experts advise parents to talk to their children’s dentists or doctors because it could interfere with the correct development of permanent teeth.

Dentists say children should have their first dental visit at least 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. What’s the main idea of the first paragraph?

A．Bad teeth can be a threat to people’s health.

B．Bad teeth come along with other health problems.

C．Tooth infections can spread to brain easily.

D．Dental care should be done at an early age.

2. According to the passage, what is the function of fluoride?

A．Making the surface on teeth much cleaner.

B．Protecting gums from being infected.

C．Keeping holes on teeth from forming.

D．Slowing down bacterial growth and acid production.

3. What is the purpose of the author in writing the passage?

A．To warn us of the deadly infections of gums and teeth.

B．To introduce the advantages of fluoridated toothpaste.

C．To draw our attention to the dental care of young children.

D．To present the research results about dental care.

【推荐1】Flat Holm, a small island in Britain's Bristol Channel, has no permanent residents and minimal infrastructure（设施）. The pretty land mass is now, however, becoming increasingly popular with tourists wishing to explore the rural landscape and view the island’s seabird colonies.

Though this is welcome news, meeting the island's growing energy needs without ruining its environment poses a challenge. Flat Holm team leader Natalie Taylor says, “As we promote the island more and we get more visitors here, there’s going to be a lot more demand for electricity so it’s really important that we’ve got a really high functioning system that can provide for those people. From an environmental point of view, we want to reduce the use of diesel（柴油）generators so that we can have as small ecological footprints as possible.”

While the Cardiff Council, which oversees the island, considered traditional solar and hydroelectricity, it was reluctant to carry out either, due to their high cost and permanent nature. According to energy and sustainability manager Gareth Harcombe, the officials were seeking a portable option that could be moved if the site was needed for another purpose.

Fortunately, the UK-based company Renovagen had the perfect solution. A small panel can provide 11kW of power within two minutes. A more extensive version, unrolled from a shipping container, can yield 300kW of electricity in less than an hour.

The solar panel “carpets”, laid on the island in early October, are being used to provide electricity to its sole pub and lighthouse. The Cardiff Council also plans to use them to charge two Nissan e-NV200 electric vehicles in the future.

In addition to providing power to remote islands like Flat Holm, Hingley hopes the Rapid Roll technology will be useful in areas affected by natural disasters. A good example is Puerto Rico, where most residents have been without electricity since Hurricane Maria destroyed the power lines in late September.

1. What is badly in need on Flat Holm?

A．Tourists.	B．Electricity.
C．Seabirds.	D．Scenery.

2. What does the underlined word “reluctant” in Paragraph 3 mean?

A．Unwilling.	B．Inconvenient.
C．Unimportant.	D．Helpless.

3. What does the author think of Renovagen’s solution?

A．Excellent.	B．Unique.
C．Strange.	D．Common.

4. What’s the best title for the passage?

A．Flat Holm-a Small Island in Britain

B．More Tourists Start to Crowd in Flat Holm

C．Portable Solar Panels Put to Test on Flat Holm Island

D．Lack of Electricity Prevents the Development of Flat Holm

【推荐2】It's easy to understand why early humans domesticated (驯养)dogs as their new best friends, domesticated dogs can guard against fierce animals and provide warmth during cold nights. But those benefits only come following domestication. Despite more than a century of study, scientists have struggled to understand what caused the domestication process in the first place.

A new theory given by Maria Lahtinen, a senior researcher, might be able to explain this puzzle. She made this theory when studying die diet of late Pleistocene hunter-gatherers in Arctic and sub — Arctic. At that time, around 20,000 to 15,000 years ago, the world was buried in the coldest period of the last ice age. In cold environments then, as today, humans tended to gain the majority of their food from animals. Nutritional deficiencies (缺失) came from the absence of fat and carbohydrates (碳水化合物), not necessarily protein. Indeed, if humans cat too much meat, they can develop protein poisoning and even die. "Because we humans are not fully adapted to an all-meat diet, we simply cannot digest protein very well," Lahtinen says.

During the coldest years of the last ice age — and especially in lough Arctic and sub-Arctic winters — reindeer, wild horses and other animals that humans killed for food would have been struggling to live. Using previously published early fossil records, Lahtinen and her colleagues calculated that the game captured by people in the Arctic and sub-Arctic during this time would have provided much more protein than they could have safely consumed.

1. What has been confusing scientists in the past century?

A．How domesticated dogs benefited humans.

B．When humans began to domesticate dogs.

C．What led to dog domestication originally.

D．Why early humans made friends with clogs.

2. What will happen if one eats too much meat?

A．It can be fatal in a short period of time.

B．He will probably digest it very well.

C．He can develop carbohydrates poisoning.

D．He will survive the cold environment.

3. What does the underlined word "game” in Paragraph 3 probably mean?

A．The fierce contests.	B．The hunting activities.
C．Wild animals or birds.	D．Some tricks or schemes.

4. What can be learned about the late Pleistocene hunter-gatherers from the last paragraph?

A．They struggled with wild horses.

B．They shared extra meat with dogs.

C．They struggled to live a good life.

D．They had trouble adapting to the cold environment.

【推荐3】There’s one easy thing you can do every day to live longer and happier, according to a recent study, and it has nothing to do with diet, exercise, or cutting out bad habits.

A review of nearly 150 studies with more than 300,000 participants found that having active social circles decreases your chances of dying by 50 percent, regardless of age, gender or medical history. “When we’re social, we live longer,” Dr. Kelli Harding noted. “Loneliness is more of a risk factor to health than other known risk factors, like high blood pressure and obesity.”

The findings are written up in Dr. Harding’s new book, The Rabbit Effect, which is about how kindness, rather than laughter, may be the best medicine. The book gets its title from a famous 1978 study of the relationship between cholesterol (胆固醇) and heart health in rabbits. Researchers accidentally discovered that those rabbits that received the most affection from their human handlers lived much longer than the others.

We live in a world where most of our social interactions happen through our phones. But to get the health benefits of a more active social circle, you don’t have to throw away your device and join a book club. More casual interactions with neighbors, shop owners, and others you meet every day can do the trick. Increasingly, those relationships can start online. That’s where Nextdoor comes in. The stated purpose of the company is “to cultivate a kinder world where everyone has a neighborhood they can depend on”.

When asked for advice on one thing you can do to live longer and happier, Dr. Harding answered it perfectly, “Be kind. It’s actually pretty amazing how much each person can make the world a better, kinder, healthier place. It really takes very little and you never know the impact you have on somebody.”

1. What do we know about The Rabbit Effect?

A．Rabbits could help live longer.

B．It’s a report about heart health.

C．Laughter could cure diseases.

D．Its title comes from a study.

2. What does the underlined phrase “do the trick” in Paragraph 4 mean?

A．Improve health and wellness.

B．Set up online relationships.

C．Build a happy and warm family.

D．Keep away from bad habits.

3. What can be inferred from Dr. Harding’s words in the last paragraph?

A．We can look for a kind neighborhood.

B．We should be kind to animals in the wild.

C．Every small act of kindness can make a difference.

D．All kinds of social activities can make a better world.