A device that stops drivers from falling asleep at the wheel is about to undergo testing at Department of Transport laboratories and could go on sale within 12 months.

The system,called driver Alert,aims to reduce deadly road accidents by 20%—40% that are caused by tiredness.Airline pilots can also use it to reduce the 30% of all pilot-error accidents that are related to fatigue.

Driver Alert is based on a computerized wristband.The device,worn by drivers or pilots gives out a sound about every four minutes during a car journey.After each sound the driver must respond by squeezing the steering wheel(方向盘).A sensor in the wristband detects this pressing action and measures the time between the sound and the driver’s response.

Tiredness is directly related to a driver’s response time.Usually,a watchful driver would take about 400 milliseconds to respond,but once that falls to more than 500 milliseconds,it suggests that the driver is getting sleepy.

In such cases the device gives out more regular and louder sounds,showing that the driver should open a window or stop for a rest.If the driver’s response continues to slow down,the sounds become more frequent until a nonstop alarm warms that the driver must stop as soon as possible.

The device has been delivered to the department’s laboratories for testing.If these tests,scheduled for six months’ time,are successful,the markers will bring the product to market within about a year.

【小题】According to the text,Driver Alert ______.

A.aims to reduce tiredness-related accidents

B.has gone through testing at laboratories

C.aims to prevent drivers from sleeping

D.has been on sale for 12 months

【小题】How should a driver respond to the sounds from Driver Alert?

A.By sounding a warning

B.By touching the wristband

C.By checking the driving time

D.By pressing the steering wheel

【小题】We can learn from the text that the driver needs to stop for a break when his response time is ______.

A.About 400 milliseconds

B.below 500 milliseconds

C.over 500 milliseconds

D.about 400 minutes

【小题】When the driver gets sleepy while driving,Driver Alert ______.

A.moves more regularly

B.stops working properly

C.opens the window for the driver

D.sounds more frequently and loudly

阅读下面短文并用英语回答问题,将答案写到答题卡相应的位置上(请注意各小题后面的词数要求)

A new study has found evidence of aggressive behavior in children who drink four or more servings of soft drinks every day.

The mothers of 3,000 five-year-olds took part in the study.They were asked to keep a record of how many servings of soft drinks their children drank over a two-month period and keep records of how they behaved.The researchers found that 43 percent of the boys and girls drank at least one daily serving of soda.Four percent of the youngsters had four or more sodas to drink every day.

Children who drank the most soda were more than two times likely to show signs of aggression.“For the children who consumed four or more soft drinks per day,we see an association between aggressive behaviors,attention problems and withdrawn behaviors.”Shakira Suglia says.The aggressive behaviors included destroying possessions belonging to others,taking part in fights and physically attacking people.

Shakira says the researchers identified the link after they considered the factors like the child’s age and sex.They also considered ____________,such as whether the boys and girls were eating sweets or given fruit drinks on a normal day.In addition,the researchers examined parenting styles and other social conditions that might be taking place in the home.

It is not quite clear why young children who drink a lot of soda have behavior problems.However,a substance often found in soft drinks is caffeine,which helps to make people feel energetic.Doctor Suglia suggests that caffeine could be causing the children to be more aggressive.

The research is part of a larger study called the Fragile Families and Child Well-being Study.It follows 5.000 poor mothers and their children in 20 American cities.

1.What is the main idea of the text?(no more than l 2 words)

2.What does the underlined word“they”in Paragraph 2 probably refer to?(no more than 5 words)

3.List three aggressive behaviors according to the text.(no more than 12 words)

4.Fill in the blank in Paragraph 4 with proper words.(no more than 3 words)

5.Complete the following statement with one word from Paragraph 5.

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