Wu said scientists had thought the land where the fossils were dug up was formed in the Cenozoic Era(新生代), which dates back 65 million years, and that the former existence of dinosaurs was not possible, but local residents kept on digging up what they called

　　dragon's bones to use as traditional Chinese medicine.

　　Scientists studied the “dragon's bones” and identified them as fossils of dinosaurs that lived between 85 to 100 million years ago in the Cretaceous Period (白垩期)of the Mesozoic Era.

　　Scientists from the Henan Provincial Geological Museum and the Chinese Academy of Geological Sciences spent two years unearthing and researching the fossils and their findings have been assessed by 30 scientists from China and the United States, Britain, Germany and Japan，Wu said.

　　The discovery is very important for research into the geological distribution, migration and evolvement (进化) of this particular species of dinosaur, said Dong Zhiming, a scientist from the Institute of Vertebrate Paleontology and Paleoanthropology(古生物学) under the Chinese Academy of Sciences, Xinhua reported.

　　36. Before the fossils unearthed in Henan Province, where did the scientists find the heaviest dinosaur?

　　A. Gansu.

　　B. Santun.

　　C. Liudian.

　　D. Ruyang. 答案与解析：A　从第三段话可以判断出科学家们在甘肃发现了最重的恐龙化石。故选A项。 37. Why did the local residents kept on digging up the fossils?

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