单选题Some experts ______ that driving while talking on a cell phone is dangerous and ______ because it prevents drivers from devoting their full attention to the road.A rescind, foolhardyB deny, perilousC contend, harmlessD contest, inconvenientE assert, di

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第一篇

A recent study,published in last week's Journal of American Medical Association,offers a picture of how risky it is to get a lift from a teenage driver. Indeed,a 16-year-old driver with three or more passengers is three times as likely to have a fatal accident as a teenager driving alone,by contrast,the risk of death for drivers between 30 and 59 decreases with. each additional passenger.
The author also found that the death rates for teenage drivers increased dramatically after 10 pm,and especially after midnight.With passengers in the car,the driver was even more likely to die in a late-night accident.
Robert Foss,a scientist at the University of North Carolina Highway safety Research Center, says the higher death rates for teenage drivers,have less to do with"really stupid behavior" than with just a lack of driving experience."The basic issue,"he says,"is that adults who are responsible for issuing licenses fail to recognize how complex and skilled a task driving is."
Both he and the author of the study believe that the way to mitigate（使······缓解）the problem is to have states institute so-called graduated licensing systems,in which getting a license is a multistage process.A graduated license requires that a teenager first prove himself capable of driving in the presence of an adult,followed by a period of driving with passenger restrictions,before graduating to full driving privileges.
Graduate licensing systems have reduced teenage driver crashes,according to recent studies. About half of the states now have some sort of graduated licensing system in place,but only 10 of those states have restrictions on passengers. California is the strictest,with a novice（新手）driver prohibited from carrying any passenger under 20(without the presence of an adult over 25)for the first six months.

A graduated license is issued to a driver who________.
A:is at least a middle school graduate
B:has learned driving at a driving school
C:gains full driving rights step by step
D:has a driving experience long enough

Some experts,who regard language primarily as a code using symbols to represent sounds,（ ）reading as simply the decoding of symbols into the sounds they stand for.These authorities contend that meaning,being concerned with thinking.

A.view
B.look
C.reassure
D.agree

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第二篇

Cell Phones : Hang Up or Keep Talking?

Millions of people are using cell phones today.In many places it is actually considered unusual not to
use one.In many countries,cell phones are very popular with young people.They find that the phones are
more than a means of communication一having a mobile phone shows that they are cool and connected.
The explosions around the world in mobile phone use make some health professionals worried.Some
doctors are concerned that in the future many people may suffer health problems from the use of mobile
phones.In England,there has been a serious debate about this issue. Mobile phone companies are worried about
the negative publicity of such ideas.They say that there is no proof that mobile phones are bad for your health.
On the other hand,why do some medical studies show changes in the brain cells of some people who use
mobile phones?Signs of change in the tissues of the brain and head can be detected with modern scanning
equipment. In one case,a traveling salesman had to retire at a young age because of serious memory loss.He
couldn't remember even simple tasks.He would often forget the name of his own son.This man used to talk
on his mobile phone for about six hours a day,every day of his working week,for a couple of years. His family
doctor blamed his mobile phone use,but his employer's doctor didn't agree.
What is it that makes mobile phones potentially harmful?The answer is radiation.High-tech machines
can detect very small amounts of radiation from mobile phones.Mobile phone companies agree that there is
some radiation,but they say the amount is too small to worry about.
As the discussion about their safety continues,it appears that it's best to use mobile phones less often.
Use your regular phone if you want to talk for a long time.Use your mobile phone only when you really need
it. Mobile phones can be very useful and convenient,especially in emergencies.In the future,mobile phones
may have a warning label that says they are bad for your health.So for now,it's wise not to use your mobile
phone too often.

On the safety issue of mobile phones,the manufacturing companies_________.
A:deny the existence of mobile phone radiation
B:develop new technology to reduce mobile phone radiation
C:try to prove that mobile phones are not harmful to health
D:hold that the amount of radiation is too small to worry about

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第二篇

Cell Phones : Hang Up or Keep Talking?

Millions of people are using cell phones today.In many places it is actually considered unusual not to
use one.In many countries,cell phones are very popular with young people.They find that the phones are
more than a means of communication一having a mobile phone shows that they are cool and connected.
The explosions around the world in mobile phone use make some health professionals worried.Some
doctors are concerned that in the future many people may suffer health problems from the use of mobile
phones.In England,there has been a serious debate about this issue. Mobile phone companies are worried about
the negative publicity of such ideas.They say that there is no proof that mobile phones are bad for your health.
On the other hand,why do some medical studies show changes in the brain cells of some people who use
mobile phones?Signs of change in the tissues of the brain and head can be detected with modern scanning
equipment. In one case,a traveling salesman had to retire at a young age because of serious memory loss.He
couldn't remember even simple tasks.He would often forget the name of his own son.This man used to talk
on his mobile phone for about six hours a day,every day of his working week,for a couple of years. His family
doctor blamed his mobile phone use,but his employer's doctor didn't agree.
What is it that makes mobile phones potentially harmful?The answer is radiation.High-tech machines
can detect very small amounts of radiation from mobile phones.Mobile phone companies agree that there is
some radiation,but they say the amount is too small to worry about.
As the discussion about their safety continues,it appears that it's best to use mobile phones less often.
Use your regular phone if you want to talk for a long time.Use your mobile phone only when you really need
it. Mobile phones can be very useful and convenient,especially in emergencies.In the future,mobile phones
may have a warning label that says they are bad for your health.So for now,it's wise not to use your mobile
phone too often.

The salesman retired young because_________.
A:he disliked using mobile phones
B:he was tired of talking on his mobile phone
C:his employer's doctor persuaded him to
D:he couldn't remember simple tasks

共用题干
第二篇

Cell Phones : Hang Up or Keep Talking?

Millions of people are using cell phones today.In many places it is actually considered unusual not to
use one.In many countries,cell phones are very popular with young people.They find that the phones are
more than a means of communication一having a mobile phone shows that they are cool and connected.
The explosions around the world in mobile phone use make some health professionals worried.Some
doctors are concerned that in the future many people may suffer health problems from the use of mobile
phones.In England,there has been a serious debate about this issue. Mobile phone companies are worried about
the negative publicity of such ideas.They say that there is no proof that mobile phones are bad for your health.
On the other hand,why do some medical studies show changes in the brain cells of some people who use
mobile phones?Signs of change in the tissues of the brain and head can be detected with modern scanning
equipment. In one case,a traveling salesman had to retire at a young age because of serious memory loss.He
couldn't remember even simple tasks.He would often forget the name of his own son.This man used to talk
on his mobile phone for about six hours a day,every day of his working week,for a couple of years. His family
doctor blamed his mobile phone use,but his employer's doctor didn't agree.
What is it that makes mobile phones potentially harmful?The answer is radiation.High-tech machines
can detect very small amounts of radiation from mobile phones.Mobile phone companies agree that there is
some radiation,but they say the amount is too small to worry about.
As the discussion about their safety continues,it appears that it's best to use mobile phones less often.
Use your regular phone if you want to talk for a long time.Use your mobile phone only when you really need
it. Mobile phones can be very useful and convenient,especially in emergencies.In the future,mobile phones
may have a warning label that says they are bad for your health.So for now,it's wise not to use your mobile
phone too often.

People buy cell phones for the following reasons EXCEPT that_________.
A:they're popular
B:they're useful
C:they're cheap
D:they're convenient

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Motoring Technology
1.2 million road deaths worldwide occur each year,plus a further 50 million injuries.To reduce car crash rate,much research now is focused on safety and new fuels-though some electric vehicle and biofuel research aims at going faster.
Travelling at speed has always been dangerous.One advanced area of research in motoring safety is the use of digital in-car assistants.They can ensure you don't miss important road signs or fall asleep .Most crashes result from human and not mechanical faults.
Some safety developments aim to improve your vision.Radar can spot obstacles in fog,while other technology"sees through"big vehicles blocking your view.
And improvements to seat belts , pedal（脚踏）controls and tyres are making driving smoot- her and safer. The colour of a car has been found to be linked with safety,as have,less surpris- ingly,size and shape.
But whatever is in the fuel tank,you don't want a thief in the driving seat and there have been many innovations（创新）.Satellite tracking and remote communications can also come into play if you crash,automatically calling for help.
Accidents cause many traffic jams,but there are more subtle interplays between vehicles that can cause jams even on a clear but busy road.Such jams can be analyzed using statistical tools.
Robotic drivers could be programmed to make traffic flow smoothly and will perhaps one day be everyone's personal chauffeur（司机）,but their latest efforts suggest that won't be soon.

Which of the following statements is true of robotic drivers?
A: It will take some time before robotic drivers are available.
B: Robotic drivers are not allowed to drive on busy roads.
C: Robotic drivers can never replace human drivers.
D: Robotic drivers are too expensive to use.

共用题干
第一篇

A recent study,published in last week's Journal of American Medical Association,offers a picture of how risky it is to get a lift from a teenage driver. Indeed,a 16-year-old driver with three or more passengers is three times as likely to have a fatal accident as a teenager driving alone,by contrast,the risk of death for drivers between 30 and 59 decreases with. each additional passenger.
The author also found that the death rates for teenage drivers increased dramatically after 10 pm,and especially after midnight.With passengers in the car,the driver was even more likely to die in a late-night accident.
Robert Foss,a scientist at the University of North Carolina Highway safety Research Center, says the higher death rates for teenage drivers,have less to do with"really stupid behavior" than with just a lack of driving experience."The basic issue,"he says,"is that adults who are responsible for issuing licenses fail to recognize how complex and skilled a task driving is."
Both he and the author of the study believe that the way to mitigate（使······缓解）the problem is to have states institute so-called graduated licensing systems,in which getting a license is a multistage process.A graduated license requires that a teenager first prove himself capable of driving in the presence of an adult,followed by a period of driving with passenger restrictions,before graduating to full driving privileges.
Graduate licensing systems have reduced teenage driver crashes,according to recent studies. About half of the states now have some sort of graduated licensing system in place,but only 10 of those states have restrictions on passengers. California is the strictest,with a novice（新手）driver prohibited from carrying any passenger under 20(without the presence of an adult over 25)for the first six months.

Which of the following situations is most dangerous according to the passage?
A:Adults giving a lift to teenagers on the highway after 10 pm.
B:A teenager driving after midnight with passengers in the car.
C:Adults driving with three or more teenage passengers late at midnight.
D:A teenager getting a lift from a stranger on the highway at midnight.

In order to be able to _______ promptly to road hazards, drivers are advised to avoid using mobile phones while driving.

A.respond
B.require
C.prove
D.promise

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第二篇

Cell Phones : Hang Up or Keep Talking?

Millions of people are using cell phones today.In many places it is actually considered unusual not to
use one.In many countries,cell phones are very popular with young people.They find that the phones are
more than a means of communication一having a mobile phone shows that they are cool and connected.
The explosions around the world in mobile phone use make some health professionals worried.Some
doctors are concerned that in the future many people may suffer health problems from the use of mobile
phones.In England,there has been a serious debate about this issue. Mobile phone companies are worried about
the negative publicity of such ideas.They say that there is no proof that mobile phones are bad for your health.
On the other hand,why do some medical studies show changes in the brain cells of some people who use
mobile phones?Signs of change in the tissues of the brain and head can be detected with modern scanning
equipment. In one case,a traveling salesman had to retire at a young age because of serious memory loss.He
couldn't remember even simple tasks.He would often forget the name of his own son.This man used to talk
on his mobile phone for about six hours a day,every day of his working week,for a couple of years. His family
doctor blamed his mobile phone use,but his employer's doctor didn't agree.
What is it that makes mobile phones potentially harmful?The answer is radiation.High-tech machines
can detect very small amounts of radiation from mobile phones.Mobile phone companies agree that there is
some radiation,but they say the amount is too small to worry about.
As the discussion about their safety continues,it appears that it's best to use mobile phones less often.
Use your regular phone if you want to talk for a long time.Use your mobile phone only when you really need
it. Mobile phones can be very useful and convenient,especially in emergencies.In the future,mobile phones
may have a warning label that says they are bad for your health.So for now,it's wise not to use your mobile
phone too often.

The writer's purpose of writing this article is to advise people_________.
A:to buy mobile phones
B:to use mobile phones less often
C:to update regular phones
D:to stop using mobile phones

共用题干
第二篇

Cell Phones : Hang Up or Keep Talking?

Millions of people are using cell phones today.In many places it is actually considered unusual not to
use one.In many countries,cell phones are very popular with young people.They find that the phones are
more than a means of communication一having a mobile phone shows that they are cool and connected.
The explosions around the world in mobile phone use make some health professionals worried.Some
doctors are concerned that in the future many people may suffer health problems from the use of mobile
phones.In England,there has been a serious debate about this issue. Mobile phone companies are worried about
the negative publicity of such ideas.They say that there is no proof that mobile phones are bad for your health.
On the other hand,why do some medical studies show changes in the brain cells of some people who use
mobile phones?Signs of change in the tissues of the brain and head can be detected with modern scanning
equipment. In one case,a traveling salesman had to retire at a young age because of serious memory loss.He
couldn't remember even simple tasks.He would often forget the name of his own son.This man used to talk
on his mobile phone for about six hours a day,every day of his working week,for a couple of years. His family
doctor blamed his mobile phone use,but his employer's doctor didn't agree.
What is it that makes mobile phones potentially harmful?The answer is radiation.High-tech machines
can detect very small amounts of radiation from mobile phones.Mobile phone companies agree that there is
some radiation,but they say the amount is too small to worry about.
As the discussion about their safety continues,it appears that it's best to use mobile phones less often.
Use your regular phone if you want to talk for a long time.Use your mobile phone only when you really need
it. Mobile phones can be very useful and convenient,especially in emergencies.In the future,mobile phones
may have a warning label that says they are bad for your health.So for now,it's wise not to use your mobile
phone too often.

The word"detected"in Paragraph 3 could be best replaced by_________.
A:cured
B:removed
C:discovered
D:caused

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第三篇

Cell Phones : Hang Up or Keep Talking?

Millions of people are using cell phones today.In many places it is actually considered unusual not to
use one.In many countries,cell phones are very popular with young people.They find that the phones are
more than a means of communication一having a mobile phone shows that they are cool and connected.
The explosions around the world in mobile phone use make some health professionals worried.Some
doctors are concerned that in the future many people may suffer health problems from the use of mobile
phones.In England,there has been a serious debate about this issue.Mobile phone companies are worried
about the negative publicity of such ideas.They say that there is no proof that mobile phones are bad for your
health.
On the other hand,why do some medical studies show changes in the brain cells of some people who use
mobile phones?Signs of change in the tissues of the brain and head can be detected with modern scanning
（扫描）equipment. In one case , a traveling salesman had to retire at a young age because of serious memory
Loss.He couldn't remember even simple tasks.He would often forget the name of his own son.This man used
to talk on his mobile phone for about six hours a day,every day of his working week,for a couple of years.
His family doctor blamed his mobile phone use,but his employer's doctor didn't agree.
What is it that makes mobile phones potentially harmful?The answer is radiation.High-tech machines
can detect very small amounts of radiation from mobile phones.Mobile phone companies agree that there is
some radiation,but they say the amount is too small to worry about.
As the discussion about their safety continues,it appears that it's best to use mobile phones less often.
Use your regular phone if you want to talk for a long time.Use your mobile phone only when you really need
it.Mobile phones can be very useful and convenient,especially in emergencies.In the future,mobile phones
may have a warning label that says they are bad for your health.So for now,it's wise not to use your mobile
phone too often.

People buy cell phones for the following reasons EXCEPT that__________.
A:they're convenient
B:they're useful
C:they're popular
D:they're cheap

共用题干
第一篇

Cell Phones: Hang Up or Keep Talking?

Millions of people are using cell phones today,In many places it is actually considered unusual not to
use one.In many countries,cell phones are very popular with Young people.They find that the phones are
more than a means of communication一having a mobile phone shows that they are cool and connected.
The explosions around the world in mobile phone use make some health professionals worried.Some
doctors are concerned that in the future many people may suffer health problems from the use of mobile
phones.In England,there has been a serious debate about this issue.Mobile phone companies are worried about
the negative publicity of such ideas.They say that there is no proof that mobile phones are bad for your health.
On the other hand,why do some medical studies show changes in the brain cells of some people who use
mobile phones?Signs of change in the tissues of the brain and head can be detected with modern scanning
（扫描）equipment. In one case , a traveling salesman had to retire at a young age because of serious memory
loss.He couldn't remember even simple tasks.He would often forget the name of his own son.This man used
to talk on his mobile phone for about six hours a day,every day of his working week,for a couple of years.
His family doctor blamed his mobile phone use,but his employer's doctor didn't agree.
What is it that makes mobile phones potentially harmful?The answer is radiation.High-tech machines
can detect very small amounts of radiation from mobile phones.Mobile phone companies agree that there is
some radiation,but they say the amount is too small to worry about.
As the discussion about their safety continues,it appears that it's best to use mobile phones less often.
Use your regular phone if you want to talk for a long time.Use your mnobile phone only when you really need
it.Mobile phones can be very useful and convenient,especially in emergencies.In the future,mobile phones
may have a warning label that says they are bad for your health.So for now,it's wise not to use your mobile
phone too often.

The salesman retired young because____________.
A:he disliked using mobile phones
B:he couldn't remember simple tasks
C:he was tired of talking on his mobile phone
D:his employer's doctor persuaded him to