By the early 1970s,after centuries of cruel and-|||-continuous hunting by settlers,600 to 800 grizzlies remained on a mere 2 percent of their former range in the-|||-Northern Rockies.In 1975,grizzlies were listed under the Endangered Species Act.-|||-Today,there are about 2,000 or more grizzly bears in the U.S.Their recovery has been so successful-|||-that the U.S.Fish and Wildlife Service has twice attempted to de-list grizzlies, which would loosen legal-|||-protections and allow them to be hunted. Both efforts were overturned due to lawsuits from conservation-|||-groups.For now,grizzlies remain listed.-|||-Obviously,if precautions (预防)aren`t taken,grizzlies can become troublesome,sometimes killing-|||-farm animals or walking through yards in search of food.If people remove food and attractants from their-|||-yards and campsites,grizzlies will typically pass by without trouble.Putting electric fencing around chicken-|||-houses and other farm animal quarters is also highly effective at getting grizzlies away."Our hope is to have-|||-a clean,attractant-free place where bears can pass through without learning bad habits,"says James Jonkel,-|||-longtime biologist who manages bears in and around Missoula.-|||-1.How do Americans look at grizzlies?-|||-A.They cause mixed feelings in people. B.They should be kept in national parks.-|||-C.They are of high scientific value. D.They are a symbol of American culture.-|||-2.What has helped the increase of the grizzly population?-|||-A.The European settlers`behavior. B.The expansion of bears`range.-|||-C.The protection by law since 1975 D.The support of Native Americans.-|||-2.What has stopped the U.S.Fish and Wildlife Service from de-listing grizzlies?-|||-A.The opposition of conservation groups. B.The successful comeback of grizzlies.-|||-C.The voice of the biologists. D.The local farmers`advocates.-|||-4.What can be inferred from the last paragraph?-|||-A.Food should be provided for grizzlies. B.People can live in harmony with grizzlies.-|||-C.A special path should be built for grizzlies. D.Technology can be introduced to protect grizzlies.

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