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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.
(
A. Feed animals.
B. Keep pets.
C. Meet friends.
D. Have babies.
(
A. In January.
B. In April.
C. In August.
D. In October.
(
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.
(
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
(
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.
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.
(
D
)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.
(
B
)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.
(
D
)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.
(
A
)24. What may cause migrating birds to have less food?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
(
B
)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.
答案
21. D 22. B 23. D 24. A 25. B
