It's very popular to travel in modern life.As travelers，we should try our best to protect the environment.Here is some advice on how to be a green traveler.
◆Make smarter flight choices
Air travel is not an environmentally﹣friendly way to travel because it uses a lot of energy.If you must fly，be sure to pack light to cut down the plane's load.And try to book a non﹣stop fight （预订直达航班）.Connecting fights （转机航班） usually require longer periods of lying and planes will use more energy.
◆Respect （尊重） natural environment
Marked hiking tails （有指示标识的游览步道） are there usually to protect the natural environment and keep wild plants safe.In beach areas，don't use products that are harmful to the sea water and try to protect the ocean's ecosystem.
◆Support locals directly
Buying handmade products and art pieces created by local people can help hand down cultural tradition and create jobs.Food that is grown locally and things that are sold by local families are often better and cheaper，all while helping keep money in local pockets.
◆Find ways to give back
Consider the ways that you can help the local community and give back while traveling.This can be as simple as picking up litter in a park or volunteering to clean up a beach.If you're planning a trip where volunteering is your main goal，make sure you won't take jobs away from local people.
| Some advice on how to be a green traveler |
|
| Make smarter flight choices |
●You can pack light and（1） in order to save time and energy. |
| Respect natural environment |
●The natural environment and wild plants （2） by marked hiking trails. ●Use products （3） harmful ingredients （成分） and try to protect the ocean's ecosystem. |
| （4） |
●Buy local products and food to help hand down cultural tradition and keep money in local pockets. |
| Find ways to give back |
●You can pick up litter in a park or （5） clean up a beach. ●You can't take jobs away from local people. |
Is it possible to have a diet（日常饮食）that's both healthy and friendly to our planet？Here are answers to your eco﹣friendly food questions.
Does what I eat influence climate（气候）change？
Yes.The world's food system is responsible for（为……负责）about one quarter of the planet﹣warming greenhouse gases that humans produce each year.That includes raising and harvesting all the plants，animals，and animal products we eat，as well as processing，packaging，and shipping food to markets all over the world.
Which foods have the largest influence？
In general，beef and lamb have the biggest climate footprint per gram of protein while plant﹣based foods like beans，rice，corn and wheat have the smallest influence.Pork，chicken，eggs are somewhere in the middle.
Is there a simple food choice I can make？
Studies have shown that people who eat a meat﹣heavy diet can reduce their food-related footprint by one third or more by moving to a vegan diet ﹣ no meat，dairy（乳制品），or eggs.If you don't want to go that far，just eat less meat.
Can I really make a difference to our planet？
We need more food to feed the world's growing population.One person alone can make only a tiny difference.If many people make changes to their diets，that will start to add up.It will make a greater difference if the world's heaviest meat eaters make some changes to their diets.
（1）According to the passage，which foods have the smallest influence on our planet？
| A． |
Beef and lamb. |
| B． |
Rice and corn. |
| C． |
Chicken and pork. |
| D． |
Beans and beef. |
（2）According to the passage，which of the following is TRUE？
| A． |
One person alone makes no difference to our planet. |
| B． |
Shipping food a lover the world has no influence on climate change. |
| C． |
All the planet﹣warming greenhouse gases come from the food system. |
| D． |
Meat eaters can reduce their food﹣related footprint by eating less meat. |
（3）What is the best title for the passage？
| A． |
How to produce more meat. |
| B． |
How to make more plant﹣based foods. |
| C． |
How to eat better for the planet. |
| D． |
How to ask eco﹣friendly food questions. |
根据短文内容，从下列选项中选出能填入空白处的最佳选项。选项中有两项多余。
The COVID﹣19 epidemic（新冠疫情）is sill spreading rapidly throughout the world.Luckily，it is under control in China with the efforts of our government and all the people.However，we should still be careful in our daily life.There're some rules for us to follow.
① Get vaccinated （打疫苗）
Since there's still no special medicine to cure（治愈） COVID﹣19， （1） The government is providing available vaccine（疫苗）for everyone in our country.If you're over 18 years old and in good health，you can get vaccinated near your community. （2）
②Wear masks（口罩）
People have been used to wearing masks since the epidemic broke out.It is summer now，maybe wearing masks in hot weather makes you feel uncomfortable.However， （3）
So whenever you go out，don't forget to put on your mask.You may look cooler with a mask on!
③Wash your hands
（4） Especially when you get home from school or work，or return from any other public places，the first thing you should do is to turn on the tap（水龙头），pick up the soap and wash your hands completely.
④Keep safe social distance（距离）
You'd better not go to crowded places.The summer vacation is beginning.If you have to go to the stores，movies，parties，supermarkets，etc，besides wearing masks，remember to keep social distance. （5）
Anyway，take good care of yourself and live a safe and happy life!
| A.Wash your hands as often as possible. B.But you have to pay! C.we don't need to do anything about it. D.What's more，it is free! E.Avoid getting too close to other people. F.the vaccine is the most important way to prevent it. G.it is still a good way to stop the virus（病毒） from spreading among people. |
Li Tao，a Junior 1 student，was quite busy over the past winter vacation but not just with homework.Li，together with his 10 classmates made a volunteer group to call on people to join in The "Clean Your Plate Campaign" （光盘行动） .
The 11 students went to many restaurants and told people the importance of saving food. "Excuse me，do you know that 950 million people around the world still haven't got enough to eat？Please don't waste food." They would say that hundreds of times every day.
China in these years has serious problems with wasted food.CCTV reports that the food Chinese people waste every year is enough to feed 200 million people for a year.
Chinese people are well ﹣ known for being generous （慷慨的）.Many even feel that they lose face if their guests have eaten all the food.
To reduce food waste is a big task，and it needs time.It's important that everyone should do their bit，just like Li.Did you finish your meals today？
Judge the following statements True（T） or False（F）.
（1）Li Tao was only busy with his homework over the past winter vacation.
（2）The 11 students went to the same restaurant and said the same words many times.
（3）The problems with wasted food in China are serious.
（4）Many Chinese people feel proud if their guests have eaten all the food.
（5）Everyone should save food to reduce food waste.
Recycling is a way to take rubbish and turn in into new products.helpful to our environment There are a number of different recycling steps that allow materials to be used more than once.
All kinds of materials can be recycled.Some of the most common things in use today include recycling plastic glass，metals and paper Things made of these materials include soda cans，plastic milk boxes，newspapers，computers and cardboard boxes.
There are a number of advantages for recycling.These include：Landfills ﹣Recycling materials means less rubbish and saves space in landfills.Resources﹣ When we use materials again，this means we can take fewer resources from the earth Pollution in general，recycling materials can produce less pollution，helping to keep our environment clean.
Be sure to recycle everything you can in your house and school There is almost a "recycle" rubbish can around.Be sure to drop your used aluminum cans and plastic bottles there.At home，be sure to put paper things like the newspapers.paper bores.and homework pages into the recycle box.
Plastics are usually marked with an identification code that shows a recycling symbol and a number from 1 to 7.This shows that the type of chemicals，or materials，is used in making the plastic.Used paper can be recycled around seven times.
It is high time we set up a recycle station in every street，across the city and the country so the cleaners can transport the rubbish conveniently.This is the only way out for handling rubbish without causing danger to the environment and our health.For ourselves，our children and our children's children，let's take action NOW!
（1）From the first paragraph，we know that .
| A． |
A we can make more money from recycling |
| B． |
recycling is helpful to our environment |
| C． |
recycling is common and popular |
| D． |
there is too much rubbish around us |
（2）In paragraph 3，we know that recycling has many advantages including .
| A． |
less rubbish |
| B． |
more space |
| C． |
less pollution |
| D． |
all the above |
（3）What kinds of materials are usually marked with an identification code？
| A． |
Paper. |
| B． |
Plastics. |
| C． |
Glass. |
| D． |
Metals. |
（4）The underlined word "handling" in the last paragraph means in Chinese.
| A． |
处理 |
| B． |
生产 |
| C． |
收购 |
| D． |
变卖 |
（5）What does the writer mainly want to tell us？
| A． |
We should recycle everything in our daily life. |
| B． |
Many resources can be saved by recycling. |
| C． |
We should take action to recycle rubbish. |
| D． |
Recycle stations should be set up in the street. |
German scientist think that your brain keeps working while you're asleep.To show that they were right，they gave two groups of students a problem to work out Group One went to sleep，and Group Two stayed awake. （1）
At the same time，from a recent study many children have missed out on 4.500 hours of sleep by the time they are seven years old.According to the Ministry of Education，primary school students should get at least 10 hours of sleep a night. （2） The answer is nine.If they don't get enough sleep at night，they will face more challenging situations in schoolwork.
Schools are taking action to make sure the students can get enough sleep.
（3） Three reasons are mentioned for the problem.Firstly they spend hours n scrolling（滚动），such as Douyin and Wechat Hours of watching the mobile phones can be harmful to their eyes and cause students to sleep less. （4） They may work overtime to get the job finished and they can't watch over he kids.Lastly，drinks like tea or coffee can also keep them excited and awake.
（5） For example，they should avoid using mobile phones too much，and drink something like milk before going to bed.
Only if schools，families and students join hands together，can students get enough sleep and be at their best in schoolwork.
阅读短文，把 A﹣E五个句子填入文中空缺处，使短文内容完整。
A.But researchers say many students still sleep less. B.In fact，students themselves should also take sleep seriously. C.Secondly，busy parents may not remind them to go to bed at the proper time. D.Then how many hours of sleep should junior high school students get a night？ E.The result showed the students who slept worked out the answer more quickly. |
Paper is one of our oldest，simplest and most important inventions.It is the pride of us Chinese，but it also presents a danger to the world.
First，the making of paper requires the loss of many millions of trees each year.According to The World Counts，between 2001 and 2019，the world lost a total of 386 million hectares of forest.Of the trees that were cut down，42 percent went to paper production.That represents a great part of the world's forests.And worldwide use of paper is expected to double in the next 40 years.Clearly，the planet cannot keep such a high rate of forest Loss.
The second great problem with paper is that when the paper is used，it is useless.A great deal of wastepaper ends up in rubbish and even landfills （废物填埋场），where it can produce harmful gases.Paper in landfills causes the release （释放） of methane，a gas that is an important factor （因素） in climate （气候） change all around the world.
One simple way to help out can greatly reduce both of these problems：paper recycling.Instead of cutting down trees，recycle used paper to meet the need of paper﹣making.Effective recycling requires an effort from everyone all over the world.The way to begin is with education and understanding.Once enough people realize the need for recycling，more effective recycling systems can be put into use.
The need is real.The loss of tees influences everybody on earth.Everyone should do their part to recycle paper and encourage government and industry to do the same.The world will be a better place for it!
Topic：The invention of paper is the （1） of us Chinese，but it also presents a danger. |
|
Two great（2） |
Paper making causes the loss of forests. ●42 percent of trees cut down were used to （3） paper. ●In the next 40 years we'll use （4） as much paper as that of today. |
Wastepaper causes the release of a kind of harmful gas. ●Used paper is no longer （5） and becomes rubbish，and even goes to landfills. ●The gas is an important factor that （6） climate change all around the world. |
|
One simple way to （7） the problem |
●We should （8） cutting down trees and recycle used paper to meet the need of paper making﹣ ●To start recycling we should educate people and make them （9 ） . ●More effective recycling systems can be carried out. |
Suggestions |
●Everyone should take part in recycling paper. ●Government and industry should be （10） to do the same. |
Pollution is one of the biggest problems in the world today.In many places，rubbish is thrown into lakes and rivers.（1）
In some cities，the air is filled with pollution.（2） If it is not cleaned up，more people will be hurt.
（3） Land and water pollution kills many animals every year.
If we do not act to improve the environment，more living things will be killed by pollution.
（4）
We should separate rubbish into different groups.In this way，it can be recycled and reused.We had better plant more trees.（5） What's more，we shouldn't put the waste into lakes or rivers.
If we can do these，we will make the world a better place to live in.
A.This makes some old people and children ill. B.As well as people，animals are also harmed by pollution. C.We can make our lakes and rivers cleaner and cleaner. D.It's time for all of us to take action right away! E.Because of this，these places have already been polluted. F.Trees reduce dust and help keep the air clean. G.A few of us should take action to protect the environment. |
We are what we eat.From high﹣calorie meals to low﹣fat lunches，much of our health depends on what we eat.We know about the benefits（益处） of eating fittingly for our physical health，but food，and cooking it，is proving to be good for our mental（心理的） health as well.
Some people are now supporting the therapeutic value of cooking food.It's not just about the end result but also the experience someone goes through.Dr Mark Salter，a consultant psychiatrist，told the BBC： "Baking and cooking are good therapies.They help patients develop planning skills，short﹣term memories and social skills—lack（缺乏） of which may lead to mental illness."
TV chef（大厨） and author Nadiya Hussain agrees that cooking is great for helping our mind.She loves to bake and became the champion of the TV show，The Great British Bake Off.She says that "Baking's always been about therapy...It's never really been about the cake." And she thinks that baking is an important tool for our socialization and mental health.
Certainly，creating some delicious food takes our mind off things and gives us something to do，helping us get through the recent lockdown.People have said that mixing dough（生面团）to make bread，for example，has given them a sense of calm and control.Research has shown that doing creative tasks，like cooking，makes us feel happier.Nicole Farmer，who studies how food influences our biology，behavior and mental health，told BBC online that "Cooking represents the human experience of food，and growing people through food，so there is no doubt it can bring us timely positive feelings."
Of course，cooking can be a very sociable activity and sharing the end result，a rewarding experience.Hopefully，as we start to mix with friends and family again，we can enjoy the benefits once more and put us all in the right state of mind.
（1）What is baking in Nadiya Hussain's eyes？
A.It's helpful for our mind.
B.It's a kind of TV programme.
C.It's always about the cake.
D.It's a tool for physical health.
（2）Creative tasks can help people get through the lockdown because they .
A.give people a lasting sense of calm and peace
B.mark the start of the experience of cooking food
C.make people feel more confident and stronger
D.help people take their mind off unhappy things
（3）Which of the following is right according to the passage？
A.Dr Mark Salter is a consultant psychiatrist of the BBC.
B.Hussain once got the first prize for her books on baking.
C.The Great British Bake Off is a TV show about cooking.
D.Nicole Farmer is a British scientist who studies biology.
（4）What is the article trying to convince（使确信） the reader of？
A.Eating fittingly for physical health.
B.Enjoying the course of cooking.
C.Sharing delicious food with others.
D.Developing our planning skills.
There are only 24 hours in a day，and usually about a third of that is spent sleeping.So is it possible to make use of this time and learn a new skill or even a language？In other words，is sleep learning possible？
Many studies have found that a basic form of learning called conditioning can happen during sleep.In a 2012 study published in the magazine Nature Neuroscience，for example，Israeli researchers found that people can learn to connect sounds with smells during sleep.The scientists played a tone to sleeping study participants while putting some rotten（腐烂的）fish beside their beds.Once awake when hearing the tone.The people held their breath in anticipation of a bad smell.
"This was a dear finding showing participants formed new memories during sleep， " said Andrillon，a scientist in this held.
Although the now memory was implicit （暗示性的），it could influence how people behave，researchers found in a 2014 study published in the Journal of Neuroscience.In that research，after spending a night in a room full of cigarette（香烟） smell mixed with rotten eggs or fish，smokers use fewer cigarettes.
Andrillon and his team members have found that learning in sleep can also go beyond simple conditioning.In their 2017 study published in Nature Communications，participants were able to pick out sound features that they had heard during sleep.
Learning abilities in sleep may spread to learning of words.In a study published in Current Biology，researchers played pairs of made﹣up words and their supposed meanings like "guga" means elephant，to sleep participants.After this，when awake，the participants did better in picking the right translation of made﹣up words in a multi﹣choice test.
So far，research suggests it may be possible to learn about the tone and pronunciation of a language or even the meaning of words while sleeping，although it is to a weaker level than what we do during the day without noticing.
（1）What is the main purpose of the text？
A.To show that sleep learning is possible.
B.To study how to make use of sleep learning.
C.To report some famous research findings.
D.To prove sleep learning is implicit and weak.
（2）What does the phrase ''new memories'' in the third paragraph refer to（指的是）？
A.Connection between participants and scientists.
B.Connection between sounds and smells.
C.The tone's influence on the rotten fish.
D.The rotten eggs' influence on cigarettes.
（3）What is the main idea of the last two paragraphs？
A.Sleep can do good to learning.
B.Language learning can happen in sleep.
C.People learn in sleep in a different language.
D.Sleep learning is better than daytime learning.
5 ways to train your brain for better sleep
The days are longer，full of sunshine and bright with the promise of enjoying a more relaxing spring and summer with your loved ones.But if you want to enjoy your daytime，it's time to improve your sleep during the night﹣time. "Sleep problems endanger health and quality （质量） of life for up to 45% of the world's population，" according to the World Sleep Society.
Sleep is one of the three keys to a healthier，longer life （the others are diet and exercise）. （1） .Here are the top five ways to improve your sleep and get some zz's：
Create a sleep nest
（2） .Science tells us that we sleep better in cooler temperatures of about 60 to 67 degrees Fahrenheit（15℃to 20℃）.
Develop a routine
Set up a bedtime ritual by taking a warm bath or shower，reading a book or listening to soft music.You're teaching your mind to relax.And stick to it.Go to bed and get up at the same time each day，even on weekends or your days off. （3） .
Cut the lights
Production of the sleep hormone melatonin （荷尔蒙褪黑激素） begins at dark.Research has found that the body will slow or stop it with light on，to get away from any light，even the blue light from your charging smart phone.
Refuse the wine
Don't turn to wine to make you calm or help you sleep.（4） .Your body needs to experience all three steps of sleep—light sleep，dream，and deep sleep—to fully repair itself.
（5） .
Heavy and spicy foods may give you heartburn or other digestive problems，thus influencing your ability to get and stay asleep.
If you try these tips and can't seem to relax，or your sleep continues to worsen，be sure to reach out to your doctor or a mental health professional.
A.The body like routine B.Avoid heavy or hot foods C.Refuse coffee later in the day D.One of the first tasks is to set up your sleep environment E.Wine may help you fall asleep，but it holds you in the lighter sleep F.Many of the ways to increase the quality of your sleep are easy to follow |
What do you do with your rubbish？Throw it out？You don't know what you're missing!Look closely at the two figures on your left.They were made from things most people throw away.The figures were made from used bottle caps.Those two bottle﹣cap figures were exhibited （展示） in a museum.
Folk art is art made by common people who have not been trained as artists.Their work is often based on traditions in their culture.Fine art，on the other hand，is usually made by people who have had training in art.Works of fine art are valued for their artistic beauty.They are supposed to be looked at but not used.Works of folk art，however，are often made for everyday use.
There were more than 800 pieces of folk art from nearly 50 countries in the exhibition.All of the pieces were made from used metal，wood，cloth，and plastic.The artists come from many different cultures.Still，they all share one thing.They take objects that are normally thrown away and change them into objects that are beautiful，useful，and fun.The artists may not think of what they do as recycling，but that's exactly what it is.Fine artists might work with expensive materials.They might use expensive tools to shape these materials into works of art.On the other hand，in poor countries rubbish might be the only material folk artists and toy makers can afford.The exhibition shows that a rich imagination is very important when there are only poor materials.Recycled art began long before people began to think about recycling.Some of the objects in the exhibition date from the 1930s.
Even if you don't create art out of rubbish，it's good to save our natural resources.Remember the three rules：reduce，reuse，recycle.If you reduce waste，true things instead of throwing them out，and recycle materials such as paper，plastic，and glass，you will protect the environment.
（1）Which idea belongs in the empty box？
Conclusion （结论） |
Details |
Art based on cultural traditions |
|
Art made for everyday use |
|
Art made with used materials |
A.Folk art is made by people who are not trained artists.
B.The artists come from many different cultures.
C.Recycled art began long before people started recycling.
（2）What can we learn from Paragraph 3？
A.There was more than 800 pieces of fine art.
B.Folk artists can't shape expensive materials into works of art.
C.Poor materials also can be made into works of art.
（3）What is the same thing of the pieces in the exhibition share？
A.They are all woks of fine art.
B.They are all made from used materials.
C.They are all made by the trained artists.
（4）What can we do to protect our environment？
A.Throw away used materials.
B.Only use expensive materials.
C.Recycle materials.
（5）Which of the following would be the best title for the passage？
A.Used Bottle Caps
B.The Art of Recycling
C.A Museum Exhibition
German scientist think that your brain keeps working while you're asleep.To show that they were right，they gave two groups of students a problem to work out Group One went to sleep，and Group Two stayed awake. （1）
At the same time，from a recent study many children have missed out on 4.500 hours of sleep by the time they are seven years old.According to the Ministry of Education，primary school students should get at least 10 hours of sleep a night. （2） The answer is nine.If they don't get enough sleep at night，they will face more challenging situations in schoolwork.
Schools are taking action to make sure the students can get enough sleep.
（3） Three reasons are mentioned for the problem.Firstly they spend hours n scrolling（滚动），such as Douyin and Wechat Hours of watching the mobile phones can be harmful to their eyes and cause students to sleep less. （4） They may work overtime to get the job finished and they can't watch over he kids.Lastly，drinks like tea or coffee can also keep them excited and awake.
（5） For example，they should avoid using mobile phones too much，and drink something like milk before going to bed.
Only if schools，families and students join hands together，can students get enough sleep and be at their best in schoolwork.
阅读短文，把 A﹣E五个句子填入文中空缺处，使短文内容完整。
A.But researchers say many students still sleep less. B.In fact，students themselves should also take sleep seriously. C.Secondly，busy parents may not remind them to go to bed at the proper time. D.Then how many hours of sleep should junior high school students get a night？ E.The result showed the students who slept worked out the answer more quickly. |
What do you do with your rubbish？Throw it out？You don't know what you're missing!Look closely at the two figures on your left.They were made from things most people throw away.The figures were made from used bottle caps.Those two bottle﹣cap figures were exhibited （展示） in a museum.
Folk art is art made by common people who have not been trained as artists.Their work is often based on traditions in their culture.Fine art，on the other hand，is usually made by people who have had training in art.Works of fine art are valued for their artistic beauty.They are supposed to be looked at but not used.Works of folk art，however，are often made for everyday use.
There were more than 800 pieces of folk art from nearly 50 countries in the exhibition.All of the pieces were made from used metal，wood，cloth，and plastic.The artists come from many different cultures.Still，they all share one thing.They take objects that are normally thrown away and change them into objects that are beautiful，useful，and fun.The artists may not think of what they do as recycling，but that's exactly what it is.Fine artists might work with expensive materials.They might use expensive tools to shape these materials into works of art.On the other hand，in poor countries rubbish might be the only material folk artists and toy makers can afford.The exhibition shows that a rich imagination is very important when there are only poor materials.Recycled art began long before people began to think about recycling.Some of the objects in the exhibition date from the 1930s.
Even if you don't create art out of rubbish，it's good to save our natural resources.Remember the three rules：reduce，reuse，recycle.If you reduce waste，true things instead of throwing them out，and recycle materials such as paper，plastic，and glass，you will protect the environment.
（1）Which idea belongs in the empty box？
| Conclusion （结论） |
Details |
| |
Art based on cultural traditions |
| Art made for everyday use |
|
| Art made with used materials |
A.Folk art is made by people who are not trained artists.
B.The artists come from many different cultures.
C.Recycled art began long before people started recycling.
（2）What can we learn from Paragraph 3？
A.There was more than 800 pieces of fine art.
B.Folk artists can't shape expensive materials into works of art.
C.Poor materials also can be made into works of art.
（3）What is the same thing of the pieces in the exhibition share？
A.They are all woks of fine art.
B.They are all made from used materials.
C.They are all made by the trained artists.
（4）What can we do to protect our environment？
A.Throw away used materials.
B.Only use expensive materials.
C.Recycle materials.
（5）Which of the following would be the best title for the passage？
A.Used Bottle Caps
B.The Art of Recycling
C.A Museum Exhibition
Dogs might have the latest tools in the fight against cancer （癌症）：their noses!Researchers at California's Pine Street Foundation （PSF） say they have trained five dogs to smell cancer on a prison's breath.This could be exciting news.
A dog's sense of smell may be 10，000 to 100，000 times stronger than ours.But can dogs really smell illness？PSF researcher Michael McCulloch says yes. "We were very surprised by how exact they were，" he said. "They were telling who had cancer，and they were also saying who didn't."
McCulloch and his team asked four healthy people and one with cancer to blow into plastic tubes （塑料管）.Special materials in the tubes kept the things of each breath.The tubes were then placed one yard apart.Finally the dogs were allowed to smell the tubes.Each dog had been trained for three weeks to sit when it smelled cancer.Ninety﹣nine percent of the time，the dog sat next to the tubes blown into by patients with lung cancer.The dogs were right 88 percent of the time about breast cancer.
| Dogs in the Pine Street Foundation test were trained to sit when they smelled cancer.How well did they perform？Take a look at this chart to find out. |
||
| Breath Sample |
Number of Times the Dogs Sat Down |
Number of Times the Dogs Kept Standing |
| Breath from lung cancer patients |
564 |
10 |
| Breath from healthy persons |
4 |
720 |
No lab test for cancer has given more correct results than this test.The results are so amazing that many experts question the dogs' smelling power.They wonder if there were other reasons why the dogs did so well.For example，they thought the way the dog trainers behaved could have influenced how the dogs acted.However，most experts agree that this study is important.The information could help scientists create a simple breath test for cancer in the future.Once again humans may be getting a helping paw or nose﹣from their best animal friends.
（1）What's the latest tool a dog might have in the fight against cancer？
A.Tooth.
B.Nose.
C.Ear.
（2）What happened first in the Pine Street Foundation test？
A.The dogs were trained.
B.The tubes were placed one yard apart.
C.The dogs smelled the tubes.
（3）What was a dog supposed to do when it smelled cancer？
A.Smell again.
B.Turn around.
C.Sit down.
（4）Look at the chart.How many times did the dogs keep standing when they smelled the breath from healthy persons？
A.Less than 10 times.
B.Almost 600 times.
C.About 700 times.
（5）Why do many experts question the dog's smelling power？
A.Because no lab test for cancer has given more correct results.
B.Because the dog trainers influenced how the dogs acted.
C.Because they don't think this study is important.
粤公网安备 44130202000953号