题目

阅读理解 In December, the intense cold turns dripping water into ice within seconds. Yet, 63-year-old Ren Jianguo gets up early before 5 am every morning to sprinkle (撒) 150 kilograms of corn on the river banks to make sure thousands of migratory birds have enough energy to make it through the winter. Over the past 26 years, Ren has been one of many volunteers protecting migratory birds on Changbai Island, where local residents label him as "Uncle Bird". For Ren himself, a cottage near the riverbank has almost become his "second home", a place from which he can observe the dynamics of the birds, provide help for injured birds, educate the public about bird conservation and, after a long day of work, light a fire and enjoy a warm meal. Winter is the busiest time for Uncle Bird. When the harsh season makes it difficult for birds to find food, he calls for donations or sometimes even pays for the food himself to guarantee their survival during the winter. "I simply want this to be a warm and welcoming place for birds when they choose to stay here for a temporary rest," he said. A report in 2021 shows that many migratory birds have changed their habit of just passing through China as they head to the Pacific Ocean or South Asia for the winter. Instead, more and more are choosing to spend winter within China's wetlands. However, when Ren settled in the city in the 1990s, only hundreds of migratory birds would come every winter. Since then, China has stepped up protection of wetlands and nature reserves by introducing new regulations and high technology. "Thirty years ago, it was impossible to see more than 8,000 birds together in the urban area. But now, thousands of the birds attract an increasing number of tourists every year. As long as they choose to stay in this city, there should be people to take care of them. However tough it is, I will stick to my choice and try to raise public awareness," Ren said. （1） Why is winter the busiest time for Mr. Ren? A . He has to receive more tourists. B . He must treat more injured birds. C . He needs to feed more migratory birds. D . He is more engaged in observing birds. （2） What causes the change in the birds' migrating habit according to the text? A . Long distance. B . High technology. C . Food shortage. D . Improved environment. （3） Which can be a suitable title for the text? A . Migratory Birds Boost Tourism B . "Uncle Bird" Devoted to Bird Protection C . Great Achievements in Wildlife Protection D . Environmental Impacts on Bird Migration 答案： C D B

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