An intelligent car

　　Driving needs sharp eyes, keen ears, quick brain, and coordination between hands and the brain. Many human drivers have all __1__ and can control a fast-moving car. But how does an intelligent car control itself?

　　There is a virtual driver in the smart car. This virtual driver has “eyes,”“brains”，“hands” and “feet”，too. The mini-cameras __2__ each side of the car are his “eyes,” which observe the road and conditions ahead of it. They watch the __3__ to the car’s left and right. There is also a highly __4__ driving system in the car. It is the built-in computer, which is the virtual driver’s “brain. ” His “brain” calculates the speeds of __5__ moving cars near it and analyzes their positions. Basing on this information, it chooses the right __6__ for the intelligent cars, and gives __7__ to the “hands”and “feets”to act accordingly. In this way, the virtual driver controls his car.

　　What is the virtual driver’s best advantage? He reacts __8__. The mini-cameras are __9__ images continuously to the “brain”. It __10__ the processing of the images within 100 milliseconds. However, the world’s best drier __11__ needs one second to react. __12__, when he takes action, he needs one more second.

　　The virtual driver is really wonderful. He can reduce the accident __13__ considerably on expressway. In this case. Can we let him have the wheel at any time and in any place? Experts __14__ that we cannot do that just yet. His ability to recognize things is still __15__. He can now only drive an intelligent car on expressways.

　　1. A. these B. them C. this D. that

　　2. A. within B. above C. to D. on

　　3. A. police B. traffic C. trucks D. buses

　　4. A. mechanical B. moveable C. automatic D. electronic

　　5. A. another B. other C. each other D. one another

　　6. A. line B.lane C. track D. path

　　7. A. space B.locations C. instructions D. time

　　8. A.quickly B. cleverly C. virtually D. safely

　　9. A.bringing B. taking C. sending D. carrying

　　10. A. selects B. completes C.uses D. tests

　　11. A. at least B. at most C. at last D. at best

　　12. A. So B. However C. Besides D. Therefore

　　13. A. count B. amount C. digit D. rate

　　14. A. warn B. suggest C. invite D. check

　　15. A. unknown B. few C. untested D. limited