职业培训教育网名师解析：芭蕾按发展历程可分为早期芭蕾和经典芭蕾。A、B、C项中的人物都是经典芭蕾时期的，只有D项中的Louis XIV是对早期芭蕾产生重要影响的人。
40 We can conclude from this passage that ballet______. A is a dying art
B will continue to change
C is currently performed only in Russia
D is often performed by dancers with little training 答案：B
职业培训教育网名师解析：由第一段可知，芭蕾之所以到现在还长盛不衰，是因为多年来一直根据流行趋势在调整和发展，因此B项正确，同时可知A项错误。芭蕾舞在世界各地都有表演，因此C项错误。芭蕾舞演员需要专业训练，可知D项错误。
第三篇
Operation Migration
If you look up at the sky in the early fall in the northern part of North America, you may see groups of birds. These birds are flying south to pieces where they can find food and warmth for the winter. They are migrating (迁
徙) The young birds usually learn to migrate from their parents. They follow their parents south. In one unusual case, however, the young birds are following something very different. These birds are young whooping cranes, and they are following an airplane!
The whooping crane is the largest bird that is native to North America. These birds almost disappeared in the 1800s. By 1941,there were only about 20 cranes alive. In the 1970s ,people were worried that these creatures were in danger of disappearing completely. As a result，the United States identified whooping cranes as an endangered species that they needed to protect.
Some researchers tried to help. They began to breed whooping cranes in special parks to increase the number of birds. This plan was successful. There were a lot of new baby birds. As the birds became older, the researchers wanted to return them to nature. However, there was a problem : These young birds did not know how to migrate. They needed human help.
In 2001, some people had a creative idea. They formed an organization called Operation Migration. This group decided to use very light airplanes, instead of birds, to lead the young whooping cranes on their first trip south. They painted each airplane to look like a whooping crane. Even the pilots wore special clothing to make them look like cranes. The cranes began to trust the airplanes, and the plan worked.
Today, planes still lead birds across approximately 1，200 miles (1,931 kilometers)，from the United States-Canadian border to the Gulf of Mexico. They leave the birds at different sites. If a trip is successful, the birds can travel on their own in the future. Then, when these birds become parents, they will teach their young to migrate. The 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 institutes. Together, they assist hundreds of cranes each year. However, some experts predict that soon, this won't be necessary. Thanks to Operation Migration and its partners, the crane population will continue to migrate. Hopefully, 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 答案：B
职业培训教育网名师解析：第一段第二句：These birds arc flying south to places where they can find food and warmth for the winter.因此选 B。
42 Whooping cranes are native to______. A Mexico
B South America C the Persian Gulf D North America 答案：D
44 The distance covered by the young whooping cranes on their trip south is______.
A 120 miles B 1,200 miles C l,931 miles
D 2,000 miles 答案：B
职业培训教育网名师解析：第五段第—句：Today, planes still lead birds accross approximately 1,200 miles...因此选B。
45 If Operation Migration is successful,whooping cranes will______. A follow airplanes south every year B live in Canada all year round C be unable to fly back
D learn to migrate on their own 答案：D
职业培训教育网名师解析：由最后—段可知，如果该计划成功的话，小美洲鹤就能学会自己迁徙，这也是这一计划的目的。
第5部分：补全短文(第46-50题，每题2分，共10分)
下面的短文有5处空白，短文后有6个句子，其中5个取自短文，请根据短文内容将其分别放回原有位置，以恢复文章原貌。
A Doctor in the House
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