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 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.

1.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

2.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.

3.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 600 milliseconds                                     D. about 4 minutes

4.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

Dear Helen,

Thank you so much for your party at Christmas Eve. All                      1 __________

of them enjoyed it very much. We liked the dishes you had                   2__________

cooked but we were happy to learn the English songs you taught          3 __________

us. We hope you’ll teach us a lot many songs in the future.                   4__________

We’re leaving from our hometowns to spend the winter                       5__________

vacations. It seems that many of us are homesick after                        6__________

being away form home for such a long time. What are your             7__________

plans? Will you join in the tourist group organized by our school?          8__________

We’re busy prepare for our trips. Please excuse us                                     9__________

for not able to say goodbye to you.                                                   10________                                                                                         

We hope you’ll have a good time.

                                                                        Yours,

                                         Xiao Hua

With more forests being destroyed, huge quantities of good earth ______ each year.

A. is washing away                                B. is being washed away

C. are washing away                              D. are being washed away

What shall we use for power when all the oil in the world has ______?

A. given out                   B. put out                      C. held up                      D. used up

The country life he was used to ______ greatly since 1992.

A. change                                              B. has changed  

C. changing                                           D. have changed

It is generally believed that teaching is ______ it is a science.

A. an art much as   B. much an art as     C. as an art much as   D. as much an art as

The warmth of ______ sweater will of course be determined by the sort of _____ wool used.

A. the; the                   B. the;不填                    C. 不填;the               D.不填；不填

I ______ ping-pong quite well, but I haven't had time to play since the new year.

A. will play                 B. have played                C. played                   D. play

A computer can only do _____ you have instructed it to do.

A. how       B. after       C. what             D. when

Visitors ______ not to touch the exhibits.

A. will request      B. request      C. are requesting      D. are requested