题目

阅读理解 It is already known that dogs can use their highly developed sense of smell to search out drugs, and disaster survivors. Now, some are being trained to find a different kind of threat — a plant species (物种) that can harm the environment. The plant is a yellow-flowered bush called Scotch broom. It is common in areas of America's Pacific Northwest, but still fairly new to New York. And its rapid growth can also close off areas to wildlife. Officials are trying to stop the plant's growth before it becomes widespread. A 2010 study reported high success rates of dogs using their noses to search out invasive (入侵的) species. The study found that trained dogs could smell and find two times more invasive plants than humans could watch with their eyes. Joshua Beese, a dog handler with the Trail Conference group, said, "If we have to find all these plants ourselves, searching the grass for every tiny plant, it will take much longer. And we will still miss a lot, because hundreds of small plants like Scotch broom are largely hidden by other local plants' growth." Another organization working on the problem is Working Dogs for Conservation. It tries to train dogs to protect wildlife and wild places, including invasive species work. The group has trained dogs in several states including Montana, Iowa, Colorado and Hawaii. Human teams had tried for years to find and remove a destructive (破坏性的) plant in one area of Montana without much success. But after two trained dogs from Working Dogs for Conservation were brought in to help, the species nearly disappeared within a few years, because they could smell plants hidden among other species. That's a game-changer. Each plant can set up to 15,000 seeds (种子) a year, and seeds can live for seven years in the soil. Dogs find plants before they flower and reproduce. （1） Why do New York officials try to stop Scotch broom's growth? A . They know little about the plant. B . They cannot control the plant's growth. C . They find the plant harmful to the environment. D . They want to see if their dogs are well trained. （2） What difficulty do humans have in finding invasive plants? A . The number of the plants is too large. B . They look too much like local plants. C . It's hard to train the dogs. D . It's not easy to see them. （3） How does the author feel about the solution to the problem of invasive plants? A . Useful. B . Doubtful. C . Puzzled. D . Surprised. （4） The organization Working Dogs for Conservation tries to train dogs to _______. ①protect wildlife             ②protect wild places ③protect invasive species     ④search out invasive species A . ①② B . ①②③ C . ①②④ D . ①②③④ （5） What is the best title for the text? A . The ways to find invasive plants B . The threat brought by invasive plants C . Scotch broom spreading widely in New York D . Dogs smelling out dangerous plant invaders 答案： C D A D D

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