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2017高考英语暑假练习（4）（答案或解析） 阅读下面短文，从每题所给的四个选项(A、B、C和D)中，选出最佳答案。 It is reported that conservation groups in North America have been arguing about the benefits and dangers of wolves. Some groups believe wolves should be killed. Other people believe wolves must be protected so that they will not disappear from the wilderness (荒野) For Killing Wolves In Alaska，the wolf almost disappeared a few years ago，because hunters were killing hundreds of them for sport. However．1aws were established to protect the wolves from sportsmen and people who catch the animals for their fur．So the wolf population has greatly increased. Now there are so many wolves that they are destroying their own food supply． A wolf naturally eats animals in the deer family. People in the wilderness also hunt deer for food．Many of the animals have been destroyed by the very cold winters recently and by changes in the wilderness plant life．When the deer can’t find enough food，they die． If the wolves continue to kill large numbers of deer，their prey(猎物)will disappear some day．And the wolves will．too．So we must change the cycle of life in the wilderness to balance the ecology．If we killed more wolves，we would save them and their prey from dying out．We’d also save some farm animals． | 
