Dia is a dog trained to track down a yellow-flowered shrub ( 灌 木 ) that’s taking root in New York State Parks. She’s one of a new breed of detection dog assisting conservationists in the fight against invasive species. With her handler, Joshua Beese, Dia began last fall to hunt for Scotch broom in Bear Mountain State Park and Harriman State Park about 50 miles north of New York City. The shrub is a widespread harmful weed in the Pacific Northwest but is fairly new to New York. Land managers hope to get rid of it before it becomes widespread.
Detection dogs have long been used to sniff out drugs, explosives and disaster survivors. Now detection dogs are becoming an important tool in the fight against invasive plants and insects. “Our field in the last 15 years has just exploded, said Pete Coppolillo, executive director of the nonprofit Working Dogs for Conservation in Bozeman, Montana. Working Dogs for Conservation has trained dogs to find spotted knapweed in Montana, Chinese bush clover in Iowa, yellow star thistle in Colorado, rosy wolf snails in Hawaii and brown tree snakes in  Guam.
Dyer’s woad, a knee-high weed from Russia that lights up roadsides with golden blossoms across the West, is a case study of how dogs can get rid of invaders that escape being found by human crews. Weed-pulling teams had tried for years to get rid of the weed at Mount Sentinel in Missoula, Montana, without making much headway. A border collie and a golden retriever from Working Dogs for Conservation were brought in to focus the teams’ efforts. Within a few years, the plants were almost gone.
The key is that the dogs can sniff out plants hidden among other species, and they don’t need flowers to identify them like people do.
Working Dogs for Conservation trains shelter dogs for detection work, screening 1,000 dogs for every one they put to work. To make the cut, the dogs have to be not only good sniffers with high-energy, but also seriously fascinated with toys so they’ll stay motivated to work for a reward: the chance to bite a ball
32.What is Dia’s work in Bear Mountain State Park and Harriman State Park?
A.To keep land managers safe.
B.To identify a new harmful plant.
C.To fight against invasive insects.
D.To sniff out drugs and explosives.
33.Why does the author mention Dyer’s woad across the West?
A.To explain how it invaded the West.
B.To show the beautiful natural scenery there.
C.To show dogs can do better than human beings.
D.To explain why the knee-high plant should be removed.
34.What’s implied in the last paragraph?
A.High-energy shelter dogs make bad detectors.
B.More rewards for detection dogs are in great need.
C.Training detection dogs to work seems challenging.
D.Toys are something easily disturbing detection dogs.
35.What would be the best title for the text?
A.Recognizing Flowers to Clear Harmful Plants
B.Training Dogs to Fight Against Invasive Plants
C.Various Weeds Appear in New York State Park
D.Endangered Plants Are Detected by Shelter Dogs
32-35 BCCB