B

Polar bears in a warming world
We use fuel for energy, but it is making the climate warmer. As a result, the ice melts, and the sea level rises. It is bad news for polar bears!
Polar bears live in the cold Arctic. The frozen Arctic is their home and the ice is their hunting ground. A polar bear usually stands on the sea ice to hunt for seals when they come up for air. But the ice has started to melt earlier each year. As the ice melts, some polar bears have lost their homes. Homeless polar bears have to move from ice to land earlier and stay on land longer. They starve because they can't find enough food.
These changes are a result of global warming. Global warming is making life difficult for polar bears. Their future is in our hands. We mustn't let them down. Let's save polar bears before it's too late.
()19. What is the main idea of the text?
A. Global warming is making our lives difficult.
B. Using too much fuel can cause global warming.
C. Polar bears are in danger because of global warming.
D. The ice in Arctic melts earlier because of global warming.
()20. How do polar bears hunt seals?
A. They break the sea ice to find seals.
B. They wait on the ice for seals to appear.
C. They swim underwater to pull seals.
D. They produce special sounds to get seals.
()21. What does the underlined word "starve" in Paragraph 2 probably mean?
A. Get sick.
B. Feel cold.
C. Lose home.
D. Become hungry.
()22. What is the writer's purpose of writing the text?
A. To explain how the climate changes.
B. To introduce what global warming is.
C. To call for help to protect polar bears.
D. To invite people to travel to the Arctic.

19.C 20.B 21.D 22.C

【分析】
本题是围绕全球变暖影响北极熊生存的阅读理解题，共4道选择题，需分别从文章主旨、细节定位、词义推断、作者写作意图四个维度分析：19题梳理全文核心确定主旨；20题精准定位原文中北极熊捕猎的描述；21题结合上下文猜测划线词含义；22题关注文末作者的呼吁明确写作目的。
【解析】
19题：全文核心是全球变暖导致北极冰融化，北极熊失去家园、无法获取食物而陷入危险。A选项偏离主旨（讲人类生活），B选项仅为背景（燃料导致变暖），D选项是现象（冰融化），均排除，选C。
20题：定位原文第二段“A polar bear usually stands on the sea ice to hunt for seals when they come up for air.”，可知北极熊在冰上等待海豹呼吸时捕猎，对应B选项，A、C、D原文未提及，排除。
21题：划线词所在句提到北极熊找不到足够食物，结合语境，starve意为“挨饿”，对应D选项，A（生病）、B（寒冷）、C（失去家园）均不符合，排除。
22题：文末作者明确呼吁“Let's save polar bears before it's too late.”，写作目的是呼吁保护北极熊，对应C选项，A、B、D均不符合，排除。
【答案】
19.C 20.B 21.D 22.C
【知识点】
英语阅读理解、主旨大意、细节理解
【点评】
本题以环保主题为背景，考查英语阅读核心能力，题型常规，需学生准确抓取原文信息、归纳主旨、推断词义及作者意图，难度适中。
【难度系数】
0.6

C
How do you spend your free time? Do you make good use of your free time? Let's see what the four students do in their free time.
I really enjoy running with my mother in the morning. We run three times a week and each time we run for an hour. That makes me feel relaxed all day. Every night after dinner, I walk our dog called Bubu for half an hour. But I hate playing football with my brother. I think it's boring and dangerous.

Sonia
I always play music in my free time. I'm in a band at school. I can play the guitar and the piano, but in the group I'm the singer. I also love taking photos. I think photos can help us remember those wonderful moments and find the beauty around. It's amazing. I like working on the photos with a computer.

Alex
In my free time, I mainly do two things—dance and karate(空手道). Dancing is a tradition in Brazil. I take a dance lesson on Tuesdays and Thursdays. And I practise karate in a club every Saturday. I enjoy myself a lot during training as I have many friends with the same interest in the club.

Mia

()23. What are the four students mainly talking about?
A. How to keep fit.
B. How to spend free time.
C. How to get along with others.
D. How to choose a suitable club.
()24. What does Sonia think of running?
A. Relaxing.
B. Boring.
C. Amazing.
D. Tiring.
()25. Why does Mia enjoy karate training?
A. Because karate is a tradition in Brazil.
B. Because she can find the beauty around.
C. Because she practises with her friends.
D. Because it's good for her body and mind.
()26. How often does Li Lei exercise?
A. Every Saturday.
B. Twice a week.
C. Three times a week.
D. Almost every day.
D

23.B 24.A 25.C 26.D

【解析】
23. 通读全文，文章开篇直接点明主题“Let's see what the four students do in their free time”，四名学生分别介绍了自己的课余活动，核心是围绕如何度过课余时间展开，对应选项B。
24. 定位Sonia的介绍部分，文中明确提到“We run three times a week and each time we run for an hour. That makes me feel relaxed all day”，可知Sonia认为跑步是令人放松的，对应选项A。
25. 定位Mia的介绍部分，文中说明“I enjoy myself a lot during training as I have many friends with the same interest in the club”，可知她享受空手道训练是因为能和有相同爱好的朋友一起练习，对应选项C。
26. 定位Li Lei的介绍部分，文中直接表述“Almost every day I take exercise”，可知Li Lei几乎每天都锻炼，对应选项D。
【答案】
23.B 24.A 25.C 26.D
【知识点】
阅读理解细节查找；主旨大意理解
【点评】
本题是典型的人物介绍类阅读理解，难度较低，所有题目均可通过定位原文对应内容直接得出答案，重点考查学生快速从文本中抓取关键信息的能力，适合巩固阅读基础解题技巧。
【难度系数】
0.8