Critics admit that V2V technology is a major development,but they are concerned about possible conflicts with other wireless devices.They say those devices already operate in the wireless frequencies planned for V2V technology.

　　Scott Belcher says people may also be concerned about their privacy.He worries about the possibility of using V2V technology to follow individual drivers and document their driving habits.Government agencies and private industry have already invested almost $1 billion in research.

　　U.S.officials expect the new technology will be required in American vehicles by early 2017.They believe it is the first step toward a better and safer transportation system.

　　1.How does the V2V communication technology work?

　　a.Cars share each other’s moving information.

　　b.V2V service is fitted to cars.

　　c.Cars recognize possible dangers and send them to their drivers.

　　d.Drivers receive warning signals and avoid danger.

　　A.b-c-d-a B.a-c-d-b

　　C.b-a-c-d D.a-b-c-d

　　2.According to Greg Winfree,the new technology will. 

　　A.cause both fewer deaths per accident and more accidents

　　B.avoid car accidents totally in the future

　　C.focus on as much as 80% of the surviving crashes

　　D.help people step away from the vehicle

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