2021年职称英语《综合类》阅读了解练习 4 |2021职称英语考试时间 职称英语网权威公布2021年职称英语《综合类》阅读了解练习，更多2021年职称英语《综合类》阅读了解练习相关信息请访问职称英语考试网 If you look up at the sky in the early fall in the northern part of North America,you may see groups of birds are flying south to places where they can find food and warmth for the are migrating The young birds usually learn to migrate from their follow their parents one unusual case,however,the young birds are following something very birds are young whooping cranes,and they are following an airplane！ The whooping crane is the largest bird that is native to North birds almost disappeared in the 1941,there were only about 20 cranes the 1970s,people were worried that these creatures were in danger of disappearing a result,the United States identified whooping cranes as an endangered species that they needed to protect. Some researchers tried to began to breed whooping cranes in special parks to increase the number of plan was were a lot of new baby the birds became older,the researchers wanted to return them to ,there was a problem： These young birds did not know how to needed human help. In 2021,some people had a creative formed an organization called Operation group decided to use very light airplanes,instead of birds,to lead the young whooping cranes on their first trip painted each airplane to look like a whooping the pilots wore special clothing to make them look like cranes began to trust the airplanes,and the plan worked. Today,planes still lead birds across approximately 1，200 miles ,from the United States-Canadian border to the Gulf of leave the birds at different a trip is successful,the birds can travel on their own in the ,when these birds become parents,they will teach their young to people of Operation Migration think this is the only way to maintain the whooping crane population. Operation Migration works with several other organizations and government ,they assist hundreds of cranes each ,some experts predict that soon,this won‘t be to Operation Migration and its partners,the crane population will continue to ,they won’t need human help any more. 41 Whooping cranes migrate in winter to ____. A raise baby whooping cranes B find warmth and food C get human help D lay eggs 42 Whooping cranes are native to ____. A Mexico B South America C the Persian Gulf D North America 43 Operation Migration aims to ____. A teach adult cranes how to fly B breed cranes in special parks C lead young cranes on their first trip south D transport cranes to the North 44 The distance covered by the young whooping cranes on their trip south is ____. A 120 miles B 1，200 miles C 1，931 miles D 2，000 miles 45 If Operation Migration is successful,whooping cranes will ____. A follow airplanes south every year B live in Canada all year around C be unable to fly back D learn to migrate on their own 答案： 41 B 第一段第二句：These birds are flying south to places where they can find food and warmth for the winter.所以选B. 42 D 第二段第一句：The whooping crane is the largest bird that is native to North America.所以选D. 43 C 第四段第三句：This group decided to use very light airplanes,instead of birds,to lead the young whooping cranes on their first trip south.故选C. 44 B 第五段第一句：Today,planes still lead birds across approximately 1，200 miles…所以选B. 45 D 由最终一段可知，假如该计划成功的话，小美洲鹤就能学会自己迁徙，这也是这一计划的目标。