题目

阅读理解     A recent study confirms that several turtle species(海龟种类) have either greatly dropped or disappeared from various sections of the Australian Murray River. "The problem is that the long life of turtles makes people unable to sense the seriousness of the situation," says Ricky Spencer, a co-author of the study, which was published in February in Scientific Reports. "It's human nature that only when something is gone do we start missing it."     Spencer and his workmates recorded the population of three once common turtle species at 52 sites along the southern areas of the river. The researchers inferred the species' population sizes from the number of individuals they caught in a given amount of time. They found the turtles have disappeared in places where they were previously rich, and most of the individuals they managed to catch elsewhere were large—and likely old—adults. Spencer and his workmates blame the losses on continuing nest predation(捕食) by foxes, accompanied by other problems, including a worse and worse environment and serious drought(干旱) in the 2000s.     "We have known about the sudden sharp drop of the population of the turtles for tens of years, and although media have covered a lot about the 'trouble of our rivers', nothing has been done," says Rick Shine from Macquarie University in Sydney. "This paper is a wake-up call that unless we begin to do something about turtle protection, we may lose an attractive part of our native creatures."     The turtles could recover quickly if action is taken to protect nests from foxes and bring back living areas, Spencer notes. But governments tend to respond only when losses reach crisis levels, and the Murray River species currently lack the government's protection, he says. He and his workmates have a solution, however. "Our next step is to start designing community protection efforts for common turtle species," he explains, "so people can actually do things without having to wait for the government's support." （1） Why are people unaware that turtles are in a very serious situation? A . The government hasn't taken action. B . They know turtles have a long life. C . Old turtles still have a large population. D . Media haven't done any report about it. （2） What is the greatest challenge for turtles according to Spencer's team? A . Foxes catch and feed on them. B . The environment is getting worse. C . The climate is extremely dry. D . Human beings kill them in quantity. （3） Which of the following does Rick Shine agree with? A . Media have already done their best. B . The study gives people a warning. C . Turtles are sure to disappear soon. D . Turtle protection is a long process. （4） What do we know from the last paragraph? A . It's not possible that turtles can avoid disappearing. B . The government is taking action against the crisis. C . Community efforts to protect turtles will start soon. D . People have to wait for the government's support. 答案： B A B C

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