《2025年通城学典课时作业本八年级英语上册译林版宿迁专版》

C
Every year, lots of animals around the world go on migrating(迁徙) journeys. Some need to find food and others are looking for someplace to produce and raise their young. Migrations can be long and difficult for animals, but new research on birds has found that farmland along the way can help them progress.
In spring, thousands of birds living near Lake Poyang, in China, fly north to Siberia, Russia. On the way, they find places to stop and eat to keep their energy levels up for the long journey. Some birds, such as geese, eat young grass that starts to grow at the beginning of the season. This food can last for only a few weeks. And rising temperatures caused by climate 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 have recently chosen to follow 246 birds, including geese and tundra swans, which are flying from Lake Poyang to Siberia. They find that the birds have changed their diets to adapt(适应) to the environments they pass through. As well as eating grass from the 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 wetlands disappear. They suggest that if farmers use different ways of harvesting, such as using machines that leave behind more seeds in fields, it could help to feed migrating birds. However, they also say wetlands must be protected, so the birds can enjoy different foods during their long journeys.
( )53. Which can be a reason for animal migration according to Paragraph 1?
A. Raising their babies.
B. Enjoying the journey.
C. Sending food to others.
D. Taking care of the old.
( )54. What problem might the birds meet when flying from Lake Poyang to Siberia?
A. There is no grass growing along the way.
B. There is a sudden drop in temperature on the way.
C. Fewer natural wetlands are left for them to find food.
D. Some of the birds set out early and eat too much grass.
( )55. What does the underlined word "This" refer to in Paragraph 2?
A. A rise in temperature.
B. Grass growing earlier than usual.
C. Climate change.
D. Birds arriving later than others.
( )56. How does the birds adapt to the environments they pass through?
A. By changing their diets.
B. By changing the way they fly.
C. By making their homes in wetlands.
D. By begging food from other animals.

答案： 53.A 54.C 55.B 56.A