In the 1940s,urban Americans began a mass move to the suburbs in search of__1__air and privacy.Suburbs began to __2_out across the countryside,since most of those making teh move were middle-class,they took with them the tax money the cities needed to maintain the neighborhood,in which they had lived.The people left in the cities were__3__those who were too old or too poor to move.Thus,many cities began to fall into disrepaire.Crime began to soar，and public__4__was neglected.Meanwhile,housing__5__costs continued to rise higher and higher.Middle-class housing was allowed to decay,and little new housing was constructed.
　　__6__,many downtown areas existed for business only.During the day they would be filled with people working in the offices and night the would be __7__.Given these circumstances,some business__8__began asking."Why bother with going downtown at all?why not move the offices to the suburbs so that we can live and work in the same area?"Gradually some of the lager companies began moving out of the cities,withe the result that urban centers__9__even further and suburbs expanded still more.This movement of businesses to the suburbs is not __10__to the United States.Businesses have also been moving to the suburbs in Stockholm,Seeden,in Bonn,Germany as well.
　　A executives B construction C fresh D deliberately E slender F transportation
　　G inspired H declined I eventually J confined K transfer L sprawl M deserted
　　N career O often
　　答案
　　c l o f b i m a h j