B
阅读下面材料,从题中所给的A、B、C、D四个选项中选出一个最佳选项。
Scientists warn: If humans don't act, 70% of polar bears could die by 2050. The main reason is global warming—Arctic ice is melting fast. By 2050, nearly half of the Arctic ice may disappear.
This study was done by American scientists. They urge governments to add polar bears to the "endangered animals list", just like how we protect giant pandas.
Why Do Polar Bears Need Ice?
Polar bears mainly eat seals, which live on ice. Without ice, polar bears must hunt on land. But they move slowly on land and find it hard to catch food. Scientists found: When ice melts, fewer baby bears survive, and mother bears struggle to have healthy babies.
How Did Scientists Study Them?
For six months, scientists tracked polar bears: observed them on the ground, checked ice from planes, used computers to predict future changes. But satellite photos show Arctic ice is melting faster than computer predictions, breaking historical records.
Another Bad News
Some rich people still hunt polar bears for "sport". At least 10 companies offer polar bear hunting trips. This makes survival even harder for polar bears.
()6. What percentage of polar bears could die by 2050 if humans don't act?
A. 10%
B. 42%
C. 70%
D. 90%
()7. Why do polar bears need ice?
A. To stay cool in summer.
B. To hunt seals for food.
C. To hide from hunters.
D. To travel to other countries.
()8. What do scientists want governments to do for polar bears?
A. Build zoos for them.
B. Add them to the "endangered animals list".
C. Stop all Arctic ice melting.
D. Train them to live on land.
()9. How did scientists study polar bears?
A. By interviewing hunters.
B. Using satellites, planes, and computers.
C. By living with polar bears for years.
D. Reading old books about the Arctic.
()10. What is another threat to polar bears mentioned in the text?
A. Pollution in the ocean.
B. Rich people hunting them for sport.
C. Baby bears eating too much.
D. Diseases from seals.

6.C 7.B 8.B 9.B 10.B

翻译:
### B
阅读下面材料，从题中所给的A、B、C、D四个选项中选出一个最佳选项。
科学家警告：如果人类不采取行动，到2050年，70%的北极熊可能会死亡。主要原因是全球变暖——北极冰正在快速融化。到2050年，近一半的北极冰可能会消失。
这项研究是由美国科学家完成的。他们敦促各国政府将北极熊列入“濒危动物名单”，就像我们保护大熊猫那样。
#### 为什么北极熊需要冰？
北极熊主要以生活在冰上的海豹为食。没有冰，北极熊就必须在陆地上捕猎。但它们在陆地上行动缓慢，很难捕捉到食物。科学家发现：当冰融化时，存活的幼熊数量会减少，母熊也很难生下健康的幼崽。
#### 科学家是如何研究它们的？
在六个月的时间里，科学家们追踪北极熊：在地面上观察它们，从飞机上检查冰层，用计算机预测未来的变化。但卫星照片显示，北极冰的融化速度比计算机预测的要快，打破了历史记录。
#### 另一个坏消息
一些富人仍然为了“娱乐”而猎杀北极熊。至少有10家公司提供猎杀北极熊的旅行项目。这使得北极熊的生存更加艰难。
( )6. 如果人类不采取行动，到2050年有多少比例的北极熊可能会死亡？
A. 10%
B. 42%
C. 70%
D. 90%
( )7. 为什么北极熊需要冰？
A. 在夏天保持凉爽。
B. 捕猎海豹获取食物。
C. 躲避猎人。
D. 前往其他国家。
( )8. 科学家希望政府为北极熊做什么？
A. 为它们建造动物园。
B. 将它们列入“濒危动物名单”。
C. 阻止所有北极冰的融化。
D. 训练它们在陆地上生活。
( )9. 科学家是如何研究北极熊的？
A. 通过采访猎人。
B. 使用卫星、飞机和计算机。
C. 通过与北极熊共同生活多年。
D. 阅读关于北极的旧书。
( )10. 文中提到的北极熊的另一个威胁是什么？
A. 海洋污染。
B. 富人将猎杀它们作为娱乐活动。
C. 幼熊吃得太多。
D. 来自海豹的疾病。