新课堂学习与探究八年级英语人教版
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(
B
)2. How do bees tell others about food sources?
A. By making sounds.
B. By dancing.
C. By leaving smells.
D. By flying in circles.
答案：B
解析：根据文中“Bees communicate by dancing to tell others where food is.”可知蜜蜂通过跳舞告诉同伴食物来源，故选 B。
(
A
)3. The underlined word “pollinators” in the passage means “______” in Chinese.
A. 授粉者
B. 捕食者
C. 生产者
D. 消费者
答案：A
解析：根据“helping our 80% of plants grow”可推测 pollinators 意为“授粉者”，故选 A。
(
B
)4. Why are bee numbers dropping?
A. They move to new habitats.
B. Climate change and pesticide use.
C. They have too much food.
D. Humans keep too many bees.
答案：B
解析：根据文中“However, bee population are falling due to climate change and pesticide use.”可知蜜蜂数量下降是因为气候变化和农药使用，故选 B。
(
C
)5. What can we do to help bees?
A. Cut down trees.
B. Use more pesticides.
C. Plant flowers.
D. Keep bees as pets.
答案：C
解析：根据文中“Scientists urge us to plant bee-friendly gardens and protect their habitats.”可知种对蜜蜂有益的花（即种花）可以帮助蜜蜂，故选 C。
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.
( )6. What is the biggest threat to polar bears?
A. Lack of food.
B. Melting sea ice.
C. Hunting.
D. Pollution.
答案：B
解析：根据文中“Polar bears are facing a critical situation due to melting Arctic ice.”可知北极熊面临的最大威胁是海冰融化，故选 B。
(
C
)7. Polar bears mainly eat ______.
A. fish
B. birds
C. seals
D. plants
答案：C
解析：根据文中“These amazing animals rely on sea ice to hunt seals, their main food.”可知北极熊主要吃海豹，故选 C。
(
B
)8. The underlined word “critical” in the passage means “______” in Chinese.
A. 安全的
B. 关键的；危急的
C. 普通的
D. 有趣的
答案：B
解析：根据后文“without urgent action, polar bears could disappear by 2100”可知 critical 意为“危急的”，故选 B。
(
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.
答案：A
解析：北极熊捕食海豹，可推测它们能控制海豹数量，对北极生态系统很重要，A 选项符合逻辑；B 选项“它们融化冰”与原文不符；文中未提及 C、D 选项内容，故选 A。
(
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：C
解析：文章主要讲了北极熊因海冰融化面临危急情况，呼吁保护它们，C 选项“保护北极熊：一项全球任务”最能概括主旨，故选 C。
