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Unit 5 Amazing Nature 复习讲义
一、单元主题与词汇精讲
主题解读：本单元围绕“神奇的自然”展开，探讨自然现象、动植物多样性及环境保护，涉及地理、生态和气候等话题。
核心词汇分类
自然现象类动植物类环保类
mountain (n.) 山脉 forest (n.) 森林 protect (v.) 保护
river (n.) 河流 bird (n.) 鸟 pollution (n.) 污染
volcano (n.) 火山 insect (n.) 昆虫 recycle (v.) 回收
例题1：
Q: The ______ in this area is very serious. We should take action.
A. mountain
B. pollution
C. forest
解析：选B。根据句意“该地区污染严重”，选pollution。
高频短语
protect the environment 保护环境
in danger 处于危险中
cut down trees 砍伐树木
save energy 节约能源
take care of 照顾
例题2：
Q: Many animals are ______ because of losing their homes.
A. in danger
B. in time
C. in fact
解析：选A。in danger表示“处于危险中”，符合语境。
二、语法专项突破
1. 形容词比较级与最高级
规则：
单音节词：tall → taller → tallest
多音节词：beautiful → more beautiful → most beautiful
不规则变化：good → better → best; bad → worse → worst
例句：
The Amazon is longer than the Nile. (比较级)
Mount Qomolangma is the highest mountain in the world. (最高级)
例题3：
Q: This is ______ (interesting) book I have ever read.
A. interesting
B. more interesting
C. the most interesting
解析：选C。最高级结构“the most interesting”。
2. 情态动词must的用法
用法：表示义务或强烈建议，意为“必须”。
结构：主语 + must/mustn’t + 动词原形
例句：
We must protect wild animals.
You mustn’t throw rubbish here.
例题4：
Q: Students ______ wear uniforms at school.
A. must
B. can
C. may
解析：选A。校规要求“必须”穿校服。
3. There be句型
规则：表示“存在”，遵循就近原则。
结构：
There is + 单数名词/不可数名词
There are + 复数名词
例句：
There is a river near the village.
There are many birds in the forest.
例题5：
Q: ______ some milk in the bottle.
A. There is
B. There are
C. Have
解析：选A。milk为不可数名词，用There is。
三、句型与话题表达
1. 描述自然现象
There are many volcanoes in this country.
The river is getting dirtier because of pollution.
2. 环保倡议
We must stop cutting down trees.
It’s important to recycle paper and plastic.
例题6：
Q: —______ we do to protect the Earth
—We can plant more trees.
A. What can
B. How can
C. Where can
解析：选A。What can we do询问“我们能做什么”。
四、题型解题技巧与例题
1. 完形填空：语境推断法
技巧：
根据自然主题词汇（如pollution, forest）选择合适选项。
注意形容词比较级与最高级的上下文提示。
例题7：
Q: The air in the city is ______ (bad) than before.
A. bad
B. worse
C. worst
解析：选B。than提示用比较级，bad的比较级为worse。
2. 阅读理解：事实细节题
技巧：
定位关键词（如地名、数字）。
对比选项与原文细节是否一致。
例题8（根据短文）：
Q: How many kinds of birds are there in the forest
A. 50
B. 100
C. 150
解析：定位原文“There are over 100 species of birds.” 选B。
3. 书面表达：环保倡议书
题目：How to Protect Our Planet
模板：
开头：Our planet is facing many problems. Here are some suggestions.
主体：First, we should... Second,... Finally,...
结尾：Let’s work together to make the Earth cleaner!
范文片段：
Our planet is facing many problems. Here are some suggestions. First, we should recycle waste like paper and bottles. Second, planting more trees can help clean the air. Finally, save water by turning off taps. Let’s work together to make the Earth cleaner!
五、单元综合检测（含解析）
Part 1 单项选择
The Yangtze River is ______ river in Asia.
A. long
B. longer
C. the longest
解析：选C。最高级结构，长江是亚洲最长河流。
Part 2 完成句子
We must ______ (保护) wild animals.
答案：protect
六、易错题专项训练
例题9：
Q: 改错：There are many pollution in the city.
答案：are → is
解析：pollution为不可数名词，用There is。
例题10：
Q: This is ______ (big) apple I have ever seen.
答案：the biggest
解析：最高级前需加the。
复习建议：
词汇分类记忆：制作“自然与环保”词汇卡（volcano, pollution, recycle）。
语法强化：每日用比较级和There be句型各造3个句子。
题型限时训练：每日完成1篇完形+1篇阅读，对照解析订正。
附：核心知识点思维导图
Unit 5 Amazing Nature
├─ 词汇
│ ├─ 自然现象类：mountain, river, volcano
│ ├─ 动植物类：forest, bird, insect
│ └─ 环保类：protect, pollution, recycle
├─ 语法
│ ├─ 形容词比较级与最高级
│ ├─ 情态动词must表义务
│ └─ There be句型（就近原则）
└─ 题型技巧
├─ 完形填空（语境推断）
├─ 阅读理解（事实细节定位）
└─ 书面表达（倡议书模板）
闯关训练
一、完形填空
Tom was walking along the beach. When he looked down the beach, he saw a man moving like a 1 . He thought that someone was dancing on the beach. So he began to walk faster to catch up. But he was not dancing at all. He was picking up 2 and throwing them into the sea.
He 3 the man and asked, “Good morning! What are you doing ”
The young man looked up and 4 , “Throwing starfish into the sea. It’s low tide (落潮) now and all of these starfish were on the beach. If I don’t throw them, they will 5 .”
“But, young man, you cannot 6 every starfish on the beach. You will 7 make it. Just give it up.”
The young man 8 and continued to pick up another starfish and throw it into the 9 . Then he said, “It made a difference for that one!”
Tom learnt that if each of us tries to do something, our world will be better. So he decided to be one of the 10 on the beach.
1．A．snake B．superman C．dancer
2．A．starfish B．bottles C．stones
3．A．flew to B．danced with C．walked to
4．A．cried B．laughed C．replied
5．A．return B．die C．sleep
6．A．touch B．kill C．save
7．A．never B．possibly C．finally
8．A．woke up B．felt encouraged C．gave a smile
9．A．boat B．sea C．sand
10．A．fishermen B．leaders C．helpers
二、单项选择
11．—So who do you think should get the job, Frank or Ben
—Well, Frank is ________. I think he should get the job.
A．outgoing B．more outgoing C．much outgoing D．the most outgoing
12．All the singers have finished singing. Let’s choose the ________ one from them.
A．good B．better C．best
13．China is over 5,000 years old. It has a much ________ history than the US. The US is not even 300 years old.
A．shorter B．longer C．faster
14．—I really like yesterday’s dragon boat race. What about you
—Me too. It’s ________ one I have ever seen.
A．a more boring B．a more wonderful
C．the most boring D．the most wonderful
15．To many Chinese, preparing the dinner on the eve of the Spring Festival is even ________ than the dinner itself.
A．less important B．the most important
C．as important as D．more important
16．I think hot drinks are _______ for you than cold drinks in winter.
A．good B．well C．better D．best
17．Today AI technology is developing ________ we can imagine. Nobody knows what will happen tomorrow.
A．much faster than B．as fast as C．more slowly than D．as slowly as
18．The Qinghai Lake is ________ lake in China. It is in Qinghai Province.
A．large B．larger C．largest D．the largest
19．—How are you feeling today, young man
—Much ________. The medicine works. Thank you, Doctor.
A．best B．better C．worst D．worse
20．Li Lei is the ________ of the three boys. He always helps us.
A．friendly B．more friendly C．most friendly
三、阅读理解
①Trees are important to us. They do a lot for people and animals.
②Trees help to keep the air clean and make us healthy. They take in dirty (脏的) air and give clean air to us. Go for a walk in the park in the morning, and it is nice to be with many trees and clean air.
③Trees are very ▲ . They give us many kinds of beautiful flowers and delicious fruits like apples and oranges. Trees give homes to insects (昆虫), birds and other animals. Even the sap (汁液) of trees can be the food for insects.
④We can use trees in many ways. But we are hurting (伤害) them and they can’t grow back quickly. We cut down trees to make paper, desks and chairs. Also, we sometimes clear the forest to build houses, shops and so on. Many animals lose (失去) their homes because of this.
⑤It is time for us to stop hurting our great friends—trees. Don’t use so much paper and join in tree-planting activities. All of us can do something for our friends!
根据材料内容选择最佳答案。
21．How do trees help us stay healthy
A．They clean the air. B．They share their sap.
C．They make us enjoy flowers. D．They give us delicious fruits.
22．Which of the following is the best for “ ▲ ”
A．smart B．colourful C．fresh D．useful
23．What does the underlined word “clear” in Paragraph 4 mean in Chinese
A．建造 B．除去 C．维护 D．排除
24．What is the structure (结构) of the passage
A． B． C． D．
25．The writer writes the passage to ________.
A．tell us not to hurt trees
B．teach us how to make use of trees
C．ask us not to make room for buildings
D．show us how to make friends with animals
试卷第1页，共3页
试卷第1页，共3页
参考答案
题号 1 2 3 4 5 6 7 8 9 10
答案 C A C C B C A C B C
题号 11 12 13 14 15 16 17 18 19 20
答案 B C B D D C A D B C
题号 21 22 23 24 25
答案 A D B C A

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