第6部分：完形填空(第51——65题，每题1分，共15分)

　　下面的短文有15处空白，请根据短文内容为每处空白确定1个最佳选项。

　　An Intelligent Car

　　Driving needs sharp eyes, keen ears, quick brain, and ______ (51) between hands and the brain. Many human drivers have all these 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 minicameras______ (52) each side of the car are his “eyes”, which ______ (53) the road conditions ahead of it. They watch the traffic to the car’s left and right. There is also a highly______ (54) driving system in the car. It is the built-in computer, which is the virtual driver’s “brain”. His “brain” calculates the speeds of ______ (55) moving cars near it and analyzes their positions. ______ (56) on this information, it chooses the right path for the intelligent car, and gives______ (57) to the “hands” and “feet” to act ______ (58). In this way, the virtual driver controls his car.

　　What is the virtual driver’s best advantage? He reacts quickly. The minicameras are ______ (59) images continuously to the “brain”. It ______ (60) the processing of the images within 100 milliseconds. However, the world’s best driver ______ (61) needs one second to react. ______ (62), when he takes action, he needs one more second.

　　The virtual driver is really wonderful. He can reduce the accident ______ (63) considerably on expressways. In this case, can we let him have the wheel at any time and in any place? Experts ______ (64) that we cannot do that just yet. His ability to recognize things is still ______ (65). He can now only drive an intelligent car on expressways.

　　51. A. coordination B. cooperation C. compensation D. condition

　　52. A. within B. above C. to D. on

　　53. A. compete B. observe C. offend D. consent

　　54. A. mechanical B. movable C. automatic D. electronic

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

　　56. A. Based B. Bases C. Had basing D. Basing

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

　　58. A. accordingly B. cleverly C. virtually D. safely

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

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

　　61. A. at 1east B. at most C. at last D. at best

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

　　63. A. count B. amongst C. digit D. rate

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

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