单项选择题

案例分析题

Police in New York have started riding bicycles to help beat crime （犯罪）.They are the latest American police to 【B1】that staying in police cars with shot-guns 【B2】bullet-proof glass is not the 【B3】way to be seen in the community.
The American police feel that in some circumstances the large cars with 【B4】red lights and noisy sirens（警笛）are more 【B5】for the citizens than for the criminals.Police who 【B6】on bicycles give the citizens a feeling that they are 【B7】.
In New York 50police officers are now 【B8】the bicycles in five different police districts.The 【B9】of police on bicycles have been 【B10】good that other police districts are 【B11】to use bicycles next year.They say 【B12】500police will be on bicycles 【B13】.
Captain Michael Shortfall，the head of New York’s community policing，says that the patrol （巡逻）car 【B14】a barrier（障碍）between the police and the citizens.The bicycle is more of a friendly 【B15】.
The bicycle is more successful in big American cities than cars 【B16】it can get into comers where cars cannot reach and can go quickly 【B17】traffic jams.A bicycle lets the police officer seem as if he is enjoying 【B18】and can talk with the 【B19】of the public.He does not have to 【B20】on like the policeman who is patrolling on foot.

【B1】（）