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Unit 4 The Wonders of Nature（复习讲义)
1. wonder 奇观；想知道
2. nature 自然；大自然
3. surface 表面；表层
4. depth 深（度）；纵深
5. dive 潜水；跳水
6. unusual 特别的；不寻常的
7. bottom 底部；最下部
单词 8. waterfall 瀑布
9. civilization 文明
10. development 发展；壮大
11. desert 沙漠；荒原
12. climber 攀登者；登山者
13. survive 生存；存活
14. degree 度；度数；程度
15. risk 使…冒风险；风险
1. natural wonders 自然奇观
2. below sea level 低于海平面
短语 3. at the bottom of 在…的底部
4. dive to 潜入…
5. a depth of 深度为…6. a distance of 距离为…
7. at all costs 不惜任何代价
8. square kilometer 平方千米
9. connect with 与…连接
10. take measures to do sth. 采取措施做某事
11. survive in 在…中存活
12. in good condition 状态良好
13. the second longest river 第二长河
14. one of the greatest wonders 最伟大的奇迹之一
1. What are the two greatest natural wonders in the world?
世界上最伟大的两大自然奇观是什么？
2. It is below sea level.
它位于海平面以下。
3. Let’s call Wonders of the World and join in the discussion.
我们给《世界奇观》栏目打电话，加入讨论吧。
4. I think natural wonders are more interesting than man-made ones.
我认为自然奇观比人造奇观更有趣。
句型 5. Which one do you think is more fantastic?
你认为哪一个更奇妙？
6. Some people believe it is the most fantastic natural wonder.
有些人认为它是最奇妙的自然奇观。
7. It runs for several hundred kilometers on the surface of the earth.
它在地球表面绵延数百公里。
8. We can hear the loud noise of the waterfall a few kilometers away.
我们在几公里外就能听到瀑布的轰鸣声。
9. Humans can survive in this desert for only three days without water.没有水的情况下，人类在这片沙漠里只能存活三天。
10. Many climbers risk their lives to climb it every year.
每年都有许多登山者冒着生命危险去攀登它。
11. It’s not just the natural wonders that attract people.
吸引人们的不只是自然奇观。
12. We should take measures to protect these natural wonders.
我们应该采取措施保护这些自然奇观。
13. The desert is so hot that few plants can grow there.
这片沙漠酷热难耐，几乎没有植物能在那里生长。
语法 形容词和副词的比较级、最高级（单元重点）， 原因/让步状语从句（衔接巩固）
写作 介绍一处自然奇观
知识点1： What is the highest mountain in the world?（教材P32）
语法：the+形容词最高级+范围(in/of)，highest为high的最高级
句式：特殊疑问句询问最高级，用于描述自然奇观的属性
拓展：one of the+最高级+复数名词（例：one of the highest mountains）
知识点2：It’s about 9,000,000 square kilometers in size.（教材P32）
- 短语：in size 表面积大小；square kilometers 平方千米
- 表达：大数字读法（9,000,000→nine million）；度量单位搭配（数字+单位+形容词）
知识点3：People like to visit the Dead Sea because it is unusual.（教材P33）
语法：because引导原因状语从句，表直接原因，可回答why
易错：because与so不能连用知识点 4：The Yangtze River is the longest river in China. It travels the farthest and is about 6,300
kilometers long.（教材P34）
语法：形容词/副词最高级（longest, farthest）
表达：河流长度的描述方式（数字+kilometers long）
知识点5：Since it is very hot in the desert, few plants can grow there.（教材P35）
语法：since引导原因状语从句，表已知、显而易见的原因，语气较弱
词汇：few 表否定，几乎没有
知识点6：Although climbing mountains is dangerous, many climbers still want to try it.（教材P36）
语法：although引导让步状语从句，though用法基本一致，though更口语化
易错：although/though与but不能连用
句式：动名词短语（climbing mountains）作从句主语
知识点7：Visiting one of the world’s largest waterfalls was a magical experience.（教材P37）
语法：动名词短语作主语（Visiting...），谓语动词用单数
词汇：magical 神奇的；experience 经历（可数）
知识点8： 1. We should protect them by all means.（教材P38）
短语：by all means 无论如何，务必
词汇：protect 保护；should 情态动词，表建议
知识点9： By the way, do you know why it’s called that?（教材P38）
短语：by the way 顺便问一下，用于转换话题
语法：宾语从句（why it’s called that），用陈述句语序
单元语法
一、形容词和副词的比较级、最高级（单元重点）1. 基本用法
- 比较级：两者对比，A + be/实义动词 + 比较级 + than + B，例：The Pacific Ocean is deeper than the
Atlantic Ocean。
- 最高级：三者及以上对比，A + be/实义动词 + the + 最高级 + in/of 短语，例：Mount Qomolangma is the
highest mountain in the world。
- 同级比较：A + be + as + 原级 + as + B（和…一样）；A + be + not as/so + 原级 + as + B（不如…）。
2. 构成规则（教材重点）
- 单音节/少数双音节词：直接 + er/est；以e结尾 + r/st；重读闭音节双写尾字母 + er/est；辅音+y结尾变
y 为 i + er/est 。 例 ： deep→deeper→deepest ； large→larger→largest ； big→bigger→biggest ；
heavy→heavier→heaviest。
- 多音节/部分双音节词：more + 原级；most + 原级。例：dangerous→more dangerous→most dangerous；
famous→more famous→most famous。
- 不 规 则 变 化 （ 教 材 必
记）：good/well→better→best；many/much→more→most；bad/badly→worse→worst；little→less→least；
far→farther/further→farthest/furthest。
3. 教材原句示例
- 比较级：The Dead Sea is saltier than any other sea in the world.
- 最高级：The Amazon River is one of the longest rivers in the world.
二、原因状语从句&让步状语从句（衔接巩固）
1. 原因状语从句（because/since/as）
- because（直接原因，可答why），例：People like to visit the Dead Sea because it is unusual。
- since/as（已知原因，语气较弱），例：Since it is very hot in the desert, few plants can grow there；As the
water is very salty, nothing can live in the Dead Sea。
- 注意：because与so不可连用。2. 让步状语从句（although/though/even though）
- although/though（虽然，用法基本一致），例：Although climbing mountains is dangerous, many climbers
still want to try it。
- even though（即使，语气更强，含假设），例：Even though the temperature is very low, some animals can
survive in the Arctic。
- 注意：although/though与but不可连用。
三、教材强调的易错点
（1）最高级前必须加the；副词最高级the可省略。
（2）比较级than后避免重复，可用that/those指代前文提到的名词，例：The weather in the north is colder
than that in the south。
（3）比较级+and+比较级表“越来越…”，例：The river is getting wider and wider。
（4）the+比较级…, the+比较级…表“越…，越…”，例：The deeper you dive, the more wonderful the sea
world is。
单元写作
作文主题本单元作文核心话题为介绍一处自然奇观，体裁以说明文为主，也可结合个人感受写成夹叙
夹议的短文，以下是清晰实用的写作思路：
一、 确定写作对象
选择熟悉或有资料支撑的自然奇观，比如教材提到的死海、瀑布、沙漠，或国内的黄山、桂林山水、
长白山天池等，确保有具体特征可写。
二、 搭建文章结构（三段式）
1. 开头段：引出话题，点明对象
（1）开门见山式：直接点明要介绍的自然奇观，例：One of the most amazing natural wonders I know is
the Dead Sea.
（2）设问引入式：用问题吸引读者，例：Have you ever heard of a sea where you can float on the waterwithout swimming? It’s the Dead Sea.
（3）背景铺垫式：简单交代奇观的地理位置，例：Located between Jordan and Israel, the Dead Sea is
famous all over the world for its special features.
2. 主体段：描述特征，突出亮点
这是文章核心部分，结合教材知识点，从3个角度展开：
（1）地理与外观特征：描述位置、面积、深度、颜色等，例：The Dead Sea is about 80 kilometers long
and 18 kilometers wide. It is the lowest point on Earth, about 430 meters below sea level.
（2）独特之处（核心亮点）：结合自然原理，解释其神奇之处，例：The water of the Dead Sea has a
very high salt content—about 30%. That’s why people can easily float on it. No fish or plants can live in it, which
is how it got its name.
（3）人文价值或现状：补充人们对它的利用，或当前的保护情况，例：Every year, thousands of
tourists come here to enjoy floating and mud baths. However, the Dead Sea is getting smaller because of human
activities. We need to take measures to protect it.
3. 结尾段：总结感受，升华主题
（1）个人感受式：表达对自然奇观的赞叹，例：Visiting the Dead Sea makes me realize how wonderful
and powerful nature is.
（2）呼吁保护式：倡导爱护自然，例：Natural wonders are gifts from nature. We should protect them so
that people in the future can also enjoy their beauty.
（3）总结概括式：简洁总结奇观的地位，例：The Dead Sea is not just a sea. It’s a great natural wonder
that shows the magic of our planet.
三、 加分技巧
1. 运用本单元语法：穿插原因状语从句和让步状语从句，例：Although the Dead Sea is called a “sea”, it
is actually a big lake because it has no connection to the ocean.
2. 使用本单元词汇：活用wonder, natural, depth, unusual, survive等单词，以及at the bottom of, below sea
level等短语。3. 增加细节描写：加入具体数字、感官体验（如the water tastes very salty），让文章更生动。
巩固练习
一、单项选择
1．—Do you know where the Dead Sea is?
—Yes, it’s a famous salt lake ________ the Jordan Valley.
A．located in B．connected with C．famous for D．close to
2．Many scientists ________ to study the deep sea and find many unusual sea animals.
A．do research B．make notes C．give a report D．design a poster
3．The Chinese climbing team ________ the summit of Qomolangma again in 2024 and raised our national flag at
the top.
A．reached B．climbed C．measured D．located
4．She has been ________ the unique rock patterns in the desert for hours, trying to capture their beauty in her
sketchbook.
A．looking up B．looking after C．looking for D．looking at
5．I’m curious ________ the Northern Lights usually appear in the polar regions.
A．why B．that C．which D．who
6．The guide asked if we ________ any experience in hiking through mountainous areas before.
A．have B．had C．will have D．has had
7．________ the Yellow River and the Yangtze River, China has many other beautiful rivers and lakes.
A．As well as B．By the way C．In the future D．That way
8．The Amazon Rainforest has ________ in the world, so it’s very important to the Earth.
A．the largest variety of plants and animals B．the deepest point
C．the biggest desert D．the longest river9．The Mariana Trench is the ________ in the world, even whales can’t reach its bottom easily.
A．deepest point B．highest cliff C．largest desert D．longest trench
10．The Sahara Desert is ________ in the world, and covers a huge area of land.
A．the biggest desert B．the deepest point C．the highest place D．the longest
river
二、单词拼写
11．I guess the temperature is b (低于) zero because it’s freezing here.
12．Last month, we r (调查) old stories about Hongcun for the school newspaper.
13．Don’t eat too much in the d (沙漠), or you’ll feel quite thirsty.
14．The government should take action to control air pollution l (程度) in cities.
15．Shenzhou-19 landed on the s (表面) of the earth safely on 30th April, 2025.
16．Huangshan Mountain attracts t (游客) from all over the world with its sunrise and sea of clouds.
17．The weather forecast said the temperature would rise by five d (度) tomorrow.
18．The girl put her arms around her mother’s s (肩膀) and gave her a kiss.
19．You can’t s (仅仅；只) memorize words; you should understand their meanings.
20．Teenagers r (面临危险) hurting their eyes if they use phones for too long.
三、完形填空
The connection between humans and the wonders of nature is profound and timeless. For centuries, people
have sought to understand and communicate with the natural world, drawing inspiration and 21 from its
beauty and mystery.
When we immerse ourselves in nature, we experience a sense of calm that is hard to find in busy urban life.
The rustle of leaves in the forest, the roar of waterfalls, and the glow of stars in the night sky—all these elements
speak to us in their own unique way. To truly connect with nature, we need to be attentive 22 . We mustput aside our distractions and focus on the sights, sounds, and smells around us.
Many scientists and explorers 23 the secrets of nature for generations. From studying the
migration of birds to exploring the depths of the ocean, their work has helped us understand how the natural world
functions. Their efforts remind us that nature’s wonders are not just beautiful—they are also complex and fragile
systems that require our care.
Respect is another key aspect of communicating with nature. When we visit natural wonders, we should act
as guests, not masters. We should not pick flowers, disturb wildlife, or leave behind trash. These small acts of
respect 24 preserve nature’s beauty for future generations.
Some people argue that in the digital age, we are losing touch with nature. While it’s true that many of us
spend more time indoors, 25 with screens, the desire to connect with the natural world remains strong.
More and more people are choosing to spend their weekends hiking, camping, or exploring national parks, seeking
to rekindle their bond with nature.
In essence, communicating with nature is a two-way process. It requires us to listen as much as we observe,
and to give as much as we take. By 26 this connection, we not only enrich our own lives but also
contribute to the preservation of the planet’s most precious treasures.
The wonders of nature are gifts that should be cherished. They teach us about patience, resilience, and the
interconnectedness (相互联系，相互依存) of all living things. 27 we continue to nurture our
relationship with nature, we will ensure that these wonders endure for centuries to come.
Whether we are standing at the foot of a towering mountain, walking along a quiet beach, or simply
watching a sunset, we are engaging in a form of communication with the natural world. This communication 28
us humility, reminding us that we are part of something much larger than ourselves.
In a world facing environmental challenges, our connection with nature is more important than ever. It
inspires us to take action to protect the planet and its wonders, ensuring that future generations can also experience
the joy and awe of 29 with nature.
So, let us embrace the opportunity to connect with the wonders of nature. Let us listen to its 30
voice, respect its power, and work together to protect it. In doing so, we will find not only peace and fulfillment butalso the strength to build a more sustainable future for all.
21．A．knowledge B．confusion C．chaos D．sadness
22．A．listeners B．speakers C．observers D．performers
23．A．have been exploring B．explore C．explored D．will explore
24．A．help B．helps C．helped D．will help
25．A．engage B．engaging C．engaged D．to engage
26．A．nurturing B．breaking C．ignoring D．ending
27．A．Unless B．If C．Though D．Because
28．A．bring B．brings C．brought D．will bring
29．A．communicating B．fighting C．competing D．struggling
30．A．fragile B．strong C．rigid D．Temporary
四、阅读理解
Natural wonders are not only sources of beauty but also vital to the health of our planet. From rainforests (热
带雨林) that produce oxygen to oceans that regulate the climate, these wonders play a crucial role in maintaining
the Earth’s ecological balance. Communicating with and protecting them is essential for our survival.
Rainforests are often called the “lungs of the Earth” because they absorb carbon dioxide and release oxygen.
They are also home to millions of plant and animal species, many of which are found nowhere else on Earth.
However, rainforests are being destroyed at an alarming rate due to deforestation for agriculture and logging. This
destruction not only threatens biodiversity but also contributes to climate change.
Oceans are another vital natural wonder. They cover over 70% of the Earth’s surface and support countless
marine species. Oceans also help regulate the planet’s temperature by absorbing heat from the sun. Unfortunately,
ocean pollution, overfishing, and ocean acidification (海洋酸化) are putting these delicate ecosystems at risk. To
protect our oceans, we need to reduce plastic waste, support sustainable fishing practices, and address climate
change.
Mountains are also important natural wonders. They provide freshwater for billions of people, supportunique ecosystems, and offer recreational opportunities for outdoor enthusiasts. However, mountain regions are
facing threats such as deforestation, soil erosion, and the effects of climate change, including melting glaciers.
Protecting mountains means preserving their ecosystems and ensuring that they continue to provide essential
resources for future generations.
31．Why are rainforests called the “lungs of the Earth”?
A．Because they are home to many animals.
B．Because they absorb carbon dioxide and release oxygen.
C．Because they are large and green.
D．Because they produce a lot of rain.
32．What is the main threat to rainforests?
A．Climate change. B．Deforestation for agriculture and logging.
C．Ocean pollution. D．Soil erosion.
33．How do oceans help regulate the Earth’s temperature?
A．By absorbing heat from the sun. B．By producing oxygen.
C．By supporting marine species. D．By reducing plastic waste.
34．What do mountains provide for billions of people?
A．Food. B．Freshwater. C．Timber. D．Minerals.
35．What is the main idea of the passage?
A．The beauty of natural wonders.
B．The importance of natural wonders and the threats they face.
C．How to explore natural wonders.
D．The history of natural wonders.
五、选词填空
阅读短文，从方框中选择适当的词并用其正确形式填空，使短文通顺、意思完整。每空限填一词，每词限用一次。
wonder admire visit see be have go feel enjoy protect
Nature has many amazing 36 that people all over the world love. The Great Barrier Reef in
Australia is one of them. It 37 a large number of colorful fish and coral reefs. Every year, millions of
tourists 38 it to admire its beauty.
I 39 the Great Barrier Reef with my parents two years ago. When I first saw it, I 40
shocked by its beauty. The water 41 clear and blue, and I could see fish swimming around freely. We
42 snorkeling and took many wonderful photos.
However, the Great Barrier Reef is in danger now because of pollution. We must 43 it. Nature’s
wonders are precious. We should love and protect them so that future generations can also 44 their
beauty. If you get a chance 45 there, don’t miss it.
