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B
Polar bears are facing a critical situation due to melting Arctic ice. These amazing animals rely on sea ice to hunt seals, their main food. As the climate warms, ice melts earlier, leaving bears with less time to eat. Polar bears are the largest land carnivores, weighing up to 600 kg. They play a key role in the Arctic ecosystem. Scientists warn that without urgent action, polar bears could disappear by 2100. Protecting their habitat is crucial for their survival and the balance of nature.
(
A. Lack of food.
B. Melting sea ice.
C. Hunting.
D. Pollution.
(
A. fish
B. birds
C. seals
D. plants
(
A. 安全的
B. 关键的
C. 普通的
D. 有趣的
(
A. They control seal numbers.
B. They melt the ice.
C. They provide food for other animals.
D. They attract tourists.
(
A. The Life of Polar Bears
B. Arctic Ice and Climate Change
C. Protect Polar Bears: A Global Task
D. How Polar Bears Hunt
Polar bears are facing a critical situation due to melting Arctic ice. These amazing animals rely on sea ice to hunt seals, their main food. As the climate warms, ice melts earlier, leaving bears with less time to eat. Polar bears are the largest land carnivores, weighing up to 600 kg. They play a key role in the Arctic ecosystem. Scientists warn that without urgent action, polar bears could disappear by 2100. Protecting their habitat is crucial for their survival and the balance of nature.
(
B
)6. What is the biggest threat to polar bears?A. Lack of food.
B. Melting sea ice.
C. Hunting.
D. Pollution.
(
C
)7. Polar bears mainly eat ________.A. fish
B. birds
C. seals
D. plants
(
B
)8. The underlined word “critical” in the passage means “________” in Chinese.A. 安全的
B. 关键的
C. 普通的
D. 有趣的
(
A
)9. Why are polar bears important to the Arctic?A. They control seal numbers.
B. They melt the ice.
C. They provide food for other animals.
D. They attract tourists.
(
C
)10. What is the best title for the passage?A. The Life of Polar Bears
B. Arctic Ice and Climate Change
C. Protect Polar Bears: A Global Task
D. How Polar Bears Hunt
答案：
6—10 BCBAC
二、阅读还原
Trees are useful to man in three very important ways.
The first important way is that they provide man with food, wood and other things. Trees provide not only man with food, but also many animals with food. 1.
The second important way is that trees give us shade. 2.
The third important way is that trees help to prevent drought and floods. However, in many parts of the world, many people don't know the third important way. 3.
5.
根据短文内容，从下列选项中选出能填入空白处的最佳选项，选项中有两项多余。
A. Man wants to make money from trees.
B. Now you know the importance of protecting trees.
C. Without trees, many animals could not live on the earth.
D. The results are even worse.
E. On a hot summer day, people are looking forward to having a rest under the shade of a tree.
F. Trees are beautiful and can make our environment more pleasant.
G. Some people like to plant trees in their gardens.
Trees are useful to man in three very important ways.
The first important way is that they provide man with food, wood and other things. Trees provide not only man with food, but also many animals with food. 1.
C
It's not easy for man to live on the earth, either.The second important way is that trees give us shade. 2.
E
You can know how important the shade of a tree is to man and to animals.The third important way is that trees help to prevent drought and floods. However, in many parts of the world, many people don't know the third important way. 3.
A
So they cut down a large number of trees. And they don't plant or look after new trees. At last they will find they lose trees. 4. D
Because if there are no trees, the rain falls on hard ground and flows away, causing floods.5.
B
If you don't do so, you will find you have lost the best friends in the end.根据短文内容，从下列选项中选出能填入空白处的最佳选项，选项中有两项多余。
A. Man wants to make money from trees.
B. Now you know the importance of protecting trees.
C. Without trees, many animals could not live on the earth.
D. The results are even worse.
E. On a hot summer day, people are looking forward to having a rest under the shade of a tree.
F. Trees are beautiful and can make our environment more pleasant.
G. Some people like to plant trees in their gardens.
答案：
1. C 2. E 3. A 4. D 5. B
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