B
Every year, lots of animals around the world go on long journeys called migrations(迁徙). Some need to find food; others are looking for somewhere to breed and raise their young. Migrations can be long and challenging for animals but new research on birds has found that farmland along the way can help their progress.
In spring, hundreds of thousands of birds living near Lake Poyang, in China, fly north to breed in Siberia, Russia. On the way, they find places to stop and eat, so that they can finish the whole journey. Some birds eat grass shoots that start to grow at the beginning of the season. This kind of food can only be got for a few weeks, and rising temperatures caused by climate(气候) change can sometimes make the grass grow earlier than usual. This means that some birds are arriving too late to eat the grass. As more land is used for farming, the natural wetlands where birds like to search for food are disappearing too.
A team of researchers recently tracked(追踪) 246 birds that were flying from Lake Poyang to Siberia. They found that the birds have changed their diets(饮食) according to the changing environments they pass through. As well as eating grass from the natural wetlands along the way, the birds are also eating seeds(种子) dropped by farmers.
The researchers believe that seeds will become a more important part of migrating birds’ diets as more natural living environments disappear. They suggest that if farmers use different ways of harvesting, such as machines that leave behind more seeds in fields, it could help to feed migrating birds. However, they also said wetlands must be protected, so the birds can get different foods during their long journeys.
()21. What does the underlined word “breed” probably mean in the first paragraph?
A. Feed animals.
B. Keep pets.
C. Meet friends.
D. Have babies.
()22. In which month will the birds living near Lake Poyang fly to Siberia, Russia?
A. In January.
B. In April.
C. In August.
D. In October.
()23. What can we learn from Paragraph 4?
A. The birds don’t like eating grass.
B. Dropped seeds are helpful to birds.
C. More and more land is used for farming.
D. Natural living environments are disappearing.
()24. What may cause less food to eat for the migrating birds?
a. The rising temperatures.
b. The late arrival of some birds.
c. The disappearance of natural wetlands.
d. The use of different harvesting ways.
A. a,b,c
B. a,b,d
C. b,c,d
D. a,c,d
()25. What is the main purpose of the text?
A. To explain the information of the migration.
B. To call on people to help the migrating birds.
C. To advise people to keep the migrating birds.
D. To show the importance of the migrating birds.

21. D
22. B
23. B
24. A
25. B

翻译:
### B
每年，世界上有许多动物会进行被称为“迁徙”的长途旅行。有些动物需要寻找食物；另一些则在寻找繁殖后代的地方。迁徙对动物来说可能漫长且充满挑战，但一项针对鸟类的新研究发现，迁徙途中的农田能对它们的行程起到帮助作用。
春天，生活在中国鄱阳湖附近的数十万只鸟会向北飞往俄罗斯西伯利亚繁殖。途中，它们会寻找停歇和进食的地方，这样才能完成整个旅程。有些鸟会吃在这个季节初开始生长的草芽。这种食物只能获取几周，而气候变化导致的气温上升有时会使草比平常更早生长。这意味着有些鸟会来得太晚，吃不到这些草。随着越来越多的土地被用于耕种，鸟类喜欢觅食的天然湿地也在消失。
一组研究人员最近追踪了246只从鄱阳湖飞往西伯利亚的鸟。他们发现，这些鸟会根据途经的不断变化的环境改变自己的饮食。除了吃沿途天然湿地里的草，这些鸟还会吃农民掉落的种子。
研究人员认为，随着更多天然生存环境的消失，种子将成为候鸟饮食中更重要的一部分。他们建议，如果农民采用不同的收割方式，比如使用能在田地里留下更多种子的机器，这可能会有助于喂养候鸟。然而，他们也表示，湿地必须得到保护，这样鸟类在漫长的旅途中才能获得不同的食物。
21. 第一段中划线单词“breed”可能是什么意思？
A. 喂养动物。
B. 养宠物。
C. 见朋友。
D. 生育后代。
22. 生活在鄱阳湖附近的鸟会在哪个月飞往俄罗斯西伯利亚？
A. 一月。
B. 四月。
C. 八月。
D. 十月。
23. 从第四段我们能了解到什么？
A. 这些鸟不喜欢吃草。
B. 掉落的种子对鸟有帮助。
C. 越来越多的土地被用于耕种。
D. 天然生存环境正在消失。
24. 什么可能导致候鸟的食物减少？
a. 气温上升。
b. 一些鸟的晚到。
c. 天然湿地的消失。
d. 不同收割方式的使用。
A. a、b、c
B. a、b、d
C. b、c、d
D. a、c、d
25. 这篇文章的主要目的是什么？
A. 解释迁徙的相关信息。
B. 呼吁人们帮助候鸟。
C. 建议人们饲养候鸟。
D. 展示候鸟的重要性。