A device that stops drivers form falling asleep at the wheel is about to undergo testing a

A device that stops drivers form 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 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 warns 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 makers will bring the product to market within about a year.

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 form sleeping

D. has been on sale for 12 months  

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.

We can learn form 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 4 minutes

     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

【小题1】A

【小题2】D

【小题3】C

【小题4】D

【小题1】本题考查根据文章细节进行推理判断的能力。根据第二段中的第一句话“The system, called Driver Alert, aims to reduce deadly road accidents by 20% - 40% that are caused by tiredness 可得出正确选项为A。根据最后一段“If these tests, scheduled for six months time, are successful, the makers will bring the product to market within about a year”得知这种产品正处于实验阶段，要在12个月后上市，故排除B、D。而选项C只是这种产品的表面作用。

【小题2】本题考查理解细节信息的能力。根据第三段中的“after each sound the driver must respond by squeezing steering wheel”判断出D项为最佳答案。

【小题3】本题考查根据文章细节进行推理判断的能力。由第四段中的“but once that falls to more than 500 milliseconds, it suggests that the driver is getting sleepy”以及第五段中的第一句话“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”可判断出，只有当司机反应的时间超过500 milliseconds 时，司机就得停下来休息一下。

【小题4】本题考查理解细节信息的能力。根据第五段的第一话“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”可判断出，当司机打盹时，这种装置就会不停地大声地叫。