文档内容
Unit 4 Amazing Plants and Animals
课时 1 Section A (1a-1d) 分层作业
核心知识速记 03 拓展培优
01 基础达标 05 思维进阶
02 能力提升
词汇
cheetah n. 猎豹 redwood tree n. 红杉树
moss n. 苔藓 blue whale n. 蓝鲸
beautiful adj. 美丽的 biggest adj. 最大的 fastest adj. 最快的；adv. 最快 heaviest adj. 最重的
地
largest adj. 最大的 longest adj. 最长的 oldest adj. 最老的；最旧的 smallest adj. 最小的
shortest adj. 最矮的；最短的
tallest adj. 最高的
句型
1. — What ’ s amazing about the cheetah? 猎豹有什么神奇之处？
— It ’ s one of the fastest land animals. 它是跑得最快的陆地动物之一。
2. — What ’ s the largest animal in the world? 世界上最大的动物是什么？
— I t’s the blue whale. 是蓝鲸。
一、单词默写
1. _______ [mɒs] n. 苔藓 4. _______ [ˈredwʊd triː] n. 红杉树
2. _______ [bluː weɪl] n. 蓝鲸 5. _______ [ˈbjuːtɪfl] adj. 美丽的
3. _______ [ˈtʃiːtə] n. 猎豹 6. _______ [fɑːst] adj. 最快的；adv. 最快地
【答案】1. moss ; 2. blue whale ; 3. cheetah ; 4. redwood tree ; 5.beautiful ; 6. fastest二、词组默写
1. 世界上最大的动物 _____________________ 5. 保护它们的家园 _______________________
2. 跑得最快的陆地动物之一 _________________ 6. 停止污染海洋 _______________________
3. 最古老的植物之一 _______________________ 7. 与…… 有联系 _______________________
4. 拒绝砍伐它们 _______________________ 8. 同意做某事 _______________________
【答案】1. the largest animal in the world ; 2. one of the fastest land animals ; 3.one of the oldest
plants ; 4.refuse to cut them down ; 5. protect their homes ; 6. stop polluting the ocean ; 7. be
connected with ; 8. agree to do sth.
三、根据要求完成句子
1. 红杉树有什么神奇之处？它是世界上最高的树之一。
What’s amazing about the redwood tree? It’s one of the _______ _______ in the world.
2. 世界上最古老的植物之一是什么？是苔藓。
What’s one of the _______ _______ in the world? It’s moss.
3. 猎豹是陆地上跑得最快的动物。
The cheetah is the _______ _______ on land.
4. 我们应该保护蓝鲸，因为它们是地球上最大的动物。
We should protect blue whales because they are the _______ _______ on Earth.
5. 苔藓很神奇，因为它大约 4.7 亿年前就出现在地球上了。
Moss is amazing because it appeared on Earth about 470 million years _______.
6. 你为什么认为红杉树很神奇？
_______ do you think redwood trees are amazing?
7. 因为它们能长得很高。
_______ they can grow very _______.
8. 我们必须停止人们杀害猎豹。
We must _______ people from _______ cheetahs.
【答案】1. tallest trees ; 2. oldest plants ; 3. fastest animal ; 4. largest animals ; 5. ago ; 6. Why ; 7.
Because; tall ; 8. stop; killing
四、用括号内所给词的适当形式填空
1. The blue whale is the _______ (large) animal in the world.
2. Moss is one of the _______ (old) plants on Earth.
3. My brother and I _______ (agree) to protect redwood trees last week.
4. I think the cheetah runs _______ (fast) than any other animal on land.5. We should stop _______ (pollute) the ocean to help blue whales.
6. The redwood tree is one of the _______ (tall) trees in the world.
【答案】1. largest ; 2. oldest ; 3. agreed ; 4. faster ; 5. polluting ; 6. tallest
五、阅读短文，从方框中选择适当的词并用其正确的形式填空（每词限用一次）
fast large old tall animal plant protect important because amazing
There are many animals and 1._______ in the world. Some of them are very 2._______. Let’s learn about some
of them.
The blue whale is the 3._______ animal on Earth. It is also one of the heaviest 4._______. The cheetah is 5.
_______ among all land animals. It can run very quickly.
Moss is one of the 6._______ plants. It appeared on Earth a long time ago. The redwood tree is one of the
7._______ trees. It can grow up to more than 100 meters.
Why are these animals and plants special? 8._______ they have unique features. We should 9._______ them
because they are 10._______ to our world.
【答案】1. plants ; 2. amazing ; 3. largest ; 4. animals ; 5. the fastest ; 6. oldest ; 7. tallest ; 8.
Because ; 9. protect ; 10. important
【导语】
本文介绍了世界上一些神奇的动物和植物，包括它们的独特特征，以及这些生物对世界的重要性和我们应
保护它们的原因。
【解析】
1. 句意：世界上有许多动物和植物。根据空前 “animals and” 以及备选词汇可知，此处应填 plant 的复数形
式 plants “植物”，与 animals 并列。故填 plants。
2. 句意：它们中的一些非常神奇。根据下文对各类生物独特之处的描述及备选词汇，此处用形容词 amazing
“神奇的” 来形容这些生物，符合语境。故填 amazing。
3. 句意：蓝鲸是地球上最大的动物。结合常识和备选词汇，蓝鲸是体型最大的动物，此处应用 large 的最高
级 largest “最大的”。故填 largest。
4. 句意：它也是最重的动物之一。“one of + 可数名词复数” 表示 “…… 之一”，结合语境及备选词汇，
此处填 animal 的复数形式 animals “动物”。故填 animals。
5. 句意：猎豹是所有陆地动物中跑得最快的。根据下文 “It can run very quickly.” 及备选词汇，此处应用
fast 的最高级 the fastest “最快的”，体现猎豹的速度优势。故填 the fastest。
6. 句意：苔藓是最古老的植物之一。“one of + the + 形容词最高级 + 可数名词复数” 表示 “最…… 之
一”，结合 “It appeared on Earth a long time ago.” 及备选词汇，此处用 old 的最高级 oldest “最古老
的”。故填 oldest。
7. 句意：红杉树是最高的树之一。“one of + the + 形容词最高级 + 可数名词复数” 表示 “最…… 之
一”，根据 “It can grow up to more than 100 meters.” 及备选词汇，此处用 tall 的最高级 tallest “最高的”。故填 tallest。
8. 句意：因为它们有独特的特征。上文以 “Why” 提问这些生物为何特别，此处应用 because “因为” 回答
原因，句首首字母大写。故填 Because。
9. 句意：我们应该保护它们，因为它们对我们的世界很重要。结合语境及备选词汇，对于重要的生物，我们
应采取保护行动，故用动词 protect “保护”，should 后接动词原形。故填 protect。
10. 句意：我们应该保护它们，因为它们对我们的世界很重要。根据语境及备选词汇，这些生物对世界有重要
意义，故用形容词 important “重要的”。故填 important。
六、阅读还原
There are many amazing plants and animals in the world. Each has its own special traits. 1.______
The kangaroo has a strong pouch on its belly. Baby kangaroos live in the pouch until they grow
up. 2.______ That's why it's a special jumper in the animal world.
3.______It turns slowly during the day to face the sun. When it grows, it can be over 3 meters
tall, with big yellow flowers. That's why it's called a "sun chaser" in the plant world.
The octopus is clever. It has eight long arms to catch food. When in danger, it can spray dark ink
to hide and escape. 4.______
The cactus is good at living in dry places.5.______ Its sharp spines keep animals from eating it.
That's why it's a great "dry land survivor."
These plants and animals show us how wonderful nature is. We must care for them.
A. The sunflower is a lovely plant. B. Let's learn about some of them.
C. That's why it's a smart survivor in the ocean.
D.It stores water in its thick stem to survive hot, dry weather.
E. It can also jump very far—up to 9 meters in one leap!
【答案】1. B；2. E；3. A；4. C；5. D
【导语】本文介绍了世界上一些神奇的动植物，如袋鼠、向日葵、章鱼和仙人掌等，它们都有各自独特的
特征，展现了大自然的奇妙。
【解析】
1. 句意：让我们来了解其中一些。前文提到世界上有很多神奇的动植物，且各有独特特征，后文开始具体介
绍几种动植物，B 选项 “Let's learn about some of them.” 起到了承上启下的作用，引出下文的介绍，
故填 B。
2. 句意：它还能跳得很远 —— 一跃可达 9 米！前文介绍袋鼠腹部有育儿袋，后文说明这使它成为动物界
特别的跳跃者，E 选项 “It can also jump very far—up to 9 meters in one leap!” 补充了袋鼠擅长跳跃
的特点，与后文衔接紧密，故填 E。
3. 句意：向日葵是一种可爱的植物。后文描述了这种植物白天会慢慢转向太阳，长大后有黄色大花，被称为
“追日者”，A 选项 “The sunflower is a lovely plant.” 明确了所介绍的植物是向日葵，符合语境，故
填 A。4. 句意：这就是为什么它是海洋中聪明的幸存者。前文讲述章鱼很聪明，遇到危险会喷墨隐藏逃跑，C 选项
“That's why it's a smart survivor in the ocean.” 解释了章鱼因这些特性成为海洋中聪明幸存者的原因，
故填 C。
5. 句意：它在粗壮的茎中储存水分，以在炎热干燥的天气中生存。前文提到仙人掌擅长在干燥地方生存，后
文说尖刺防止动物吃它，D 选项 “It stores water in its thick stem to survive hot, dry weather.” 说明
了仙人掌适应干燥环境的另一个方式，符合逻辑，故填 D。
七、阅读理解
Rainforests（热带雨林） are some of the most amazing places on Earth. They cover only about 6%
of the world's land, but are home to more than half of all living things. These dense forests are full of
life, from tiny insects to large animals, and from small plants to tall trees.
The rainforest has different layers. The top layer is called the emergent layer, where the tallest trees
reach up to 70 meters. Below that is the canopy, a thick layer of leaves and branches that stops most
sunlight from reaching the layers below. Next is the understory, with smaller trees and bushes. The
bottom layer is the forest floor, where only a little sunlight gets through.
Many rainforest animals have special skills to live in their layers. For example, sloths hang from the
canopy branches. Their long claws help them stay there, and their slow movement helps them save
energy. Toucans have big beaks to reach fruit on thin branches that can't hold their weight. On the forest
floor, jaguars use their spots to hide in the shadows while hunting.
Rainforests are important for the whole world. They take in carbon dioxide（二氧化碳） and give
out oxygen（氧气）, which helps keep the air clean. They also help control the world's weather. But
rainforests are in danger. Every year, large areas are cut down for wood or to make space for farms.
This destroys the homes of many animals and plants, and may even change the world's climate.
1. (细节理解题) What percentage of the world's land do rainforests cover?
A.About 6% B. About 16%
C. About 26% D. About 36%
2. (词义推测题) What does the word "dense" mean in the first paragraph?
A. Dry B. Thick with plants
C. Cold D. Easy to walk through
3. (推理判断题) Why do toucans have big beaks?
A. To hang from branches B. To hide from predators
C. To reach fruit on thin branches D. To run fast on the forest floor
4. (排序题) Put the layers of the rainforest from top to bottom.
① understory ② emergent layer ③ forest floor ④ canopy
A. ②→④→①→③ B. ④→②→①→③
C. ②→①→④→③ D. ④→①→②→③
5. (主旨大意题) What is the main idea of the passage?
A. How animals live in the rainforestB. The layers of the rainforest
C. Why rainforests are amazing and important
D. How to cut down rainforests
【答案】1. A；2. B；3. C；4. A；5. C
【导语】本文介绍了热带雨林的相关情况，包括其覆盖面积、分层结构、生活在其中的动物的特殊生存技
能，以及热带雨林的重要性和面临的危险。
【解析】
1. 细节理解题。根据第一段“They cover only about 6% of the world's land”可知，热带雨林覆盖世界
陆地的大约6%，故选A。
2. 词义推测题。结合上下文，热带雨林中生活着从微小昆虫到大型动物、从小植物到高大树木等众多生
物，由此可推测“dense”意为“植物茂密的”，故选B。
3. 推理判断题。根据第三段“Toucans have big beaks to reach fruit on thin branches that can't hold their
weight”可知，巨嘴鸟有大喙是为了够到细树枝上的水果，故选C。
4. 排序题。根据第二段对雨林层次的描述：最上层是the emergent layer（②），其下方是the canopy
（④），接下来是the understory（①），最底层是the forest floor（③），所以顺序是②→④→①→③，
故选A。
5. 主旨大意题。文章围绕热带雨林展开，介绍了它的神奇之处（如生物种类多、有分层结构等）和重要性
（如净化空气、控制天气等），还提及了它面临的危险，C选项“为什么热带雨林神奇且重要”能概括文
章主旨，故选C。
八、完形填空
The cheetah is one of the most amazing animals in the world. It lives in Africa. Cheetahs are 1.______ than any
other animal on land. They can run at a speed of up to 120 kilometers per hour. But they can't run fast for a long time.
They get tired 2.______.
Cheetahs have special features that help them run fast. They have long legs and a long tail. The tail helps them
keep their balance 3.______ running. Their claws are also special. They are like spikes (尖状物) that help the cheetah
4.______ on the ground.
Cheetahs have a slim body and strong muscles. These help them move 5.______ when chasing prey. Their eyes
are large, which lets them 6.______ their prey from far away.
Cheetahs are carnivores (食肉动物). They eat small animals like rabbits and deer. They 7.______ their prey by
running fast. They can catch their prey quickly, but if they fail, they need to rest for a while.
Baby cheetahs learn to hunt from their mothers. They start 8.______ small animals when they are about three
months old. By the time they are a year old, they can hunt on their own.
But cheetahs are in danger. People are taking over their land. They are also killing cheetahs. We need to 9.______
cheetahs. We can do this by protecting their homes and stopping people from killing them. If we don't act now, there
may be no cheetahs 10.______ in the future.1. A. fast B. faster C. fastest D. the fastest
2. A. easily B. slowly C. quickly D. happily
3. A. when B. before C. after D. until
4. A. stand B. run C. walk D. jump
5. A. slowly B. suddenly C. smoothly D. loudly
6. A. hear B. smell C. touch D. see
7. A. catch B. eat C. find D. see
8. A. hunting B. feeding C. watching D. helping
9. A. kill B. protect C. eat D. catch
10. A. left B. stayed C. kept D. lived
【答案】1. B；2. C；3. A；4. B；5. C；6. D；7. A；8. A；9. B；10. A
【导语】本文介绍了猎豹这一神奇的动物，包括其生活地点、奔跑速度、有助于快速奔跑的特殊身体构
造、捕食习性、幼崽的成长以及目前面临的生存危险和保护需求。
【解析】
1. 句意：猎豹比陆地上任何其他动物都跑得快。根据空后的 “than” 可知，此处应用比较级，fast 的比较
级是 faster，故选 B。
2. 句意：它们很快就会累。根据前文 “But they can't run fast for a long time.” 可知，猎豹不能长时间快
速奔跑，所以会很快疲劳，quickly “快速地” 符合语境，故选 C。
3. 句意：尾巴在奔跑时帮助它们保持平衡。结合语境，此处表示 “当奔跑的时候”，when“当…… 时”
符合逻辑，故选 A。
4. 句意：它们的爪子像尖状物一样，帮助猎豹在地上奔跑。前文一直在说猎豹跑得快以及有助于奔跑的特
征，所以此处指爪子帮助奔跑，run “奔跑” 符合语境，故选 B。
5. 句意：这些帮助它们在追逐猎物时灵活移动。根据 “a slim body and strong muscles” 可知，这样的身
体构造能让它们移动得很灵活，smoothly“灵活地；顺畅地” 符合语境，故选 C。
6. 句意：它们的眼睛很大，能让它们从远处看到猎物。眼睛的功能是看，see “看见” 符合语境，故选
D。
7. 句意：它们通过快速奔跑来捕捉猎物。根据后文 “They can catch their prey quickly” 可知，此处指捕
捉猎物，catch “捕捉” 符合语境，故选 A。
8. 句意：它们大约三个月大的时候开始捕猎小动物。根据前文 “Baby cheetahs learn to hunt from their
mothers.” 可知，此处指开始捕猎，hunting “捕猎” 符合语境，故选 A。
9. 句意：我们需要保护猎豹。根据前文 “But cheetahs are in danger.” 以及后文 “We can do this by
protecting their homes and stopping people from killing them.” 可知，猎豹处于危险中，所以需要保护它
们，protect “保护” 符合语境，故选 B。
10. 句意：如果我们现在不采取行动，未来可能就没有猎豹剩下了。left “剩下的” 在此处作后置定语，修饰
cheetahs，符合语境，故选 A。Part 1: Read and Explore
The blue whale is the largest animal that has ever lived on Earth. It can grow up to 30 meters long and weigh
as much as 173 tons. That's about the weight of 25 African elephants!
Blue whales live in the ocean. They eat small sea animals called krill (磷虾). An adult blue whale can eat up to
4 tons of krill in a day.
Blue whales are in danger. There are only about 10,000 to 25,000 blue whales left in the world. The main
reasons are:
People hunt them for their oil and meat.
The ocean is being polluted, which hurts the krill that blue whales eat.
Ships sometimes hit blue whales, killing them.
We need to protect blue whales. Many countries have made laws to stop hunting blue whales. We can also help
by keeping the ocean clean.
Part 2: Skills Challenge
Task 1: Critical Thinking（根据文章内容回答下列问题）
1. Why is krill important to blue whales? (用 "because" 完整回答)
2. 找出两个蓝鲸濒危的原因：
Reason 1:____________________________________________________________________________________
Reason 2:____________________________________________________________________________________
3. 设计一个英文标语呼吁保护蓝鲸：
"_________________________________________!"
Task 2: Complete the chart below（根据文章内容完成表格）
Animal Home Special Food Actions to save them
Blue whale __________ __________ 2. __________________________________
3. __________________________________
Task 3: Creative Project
假设你是一名环保志愿者，设计一个 “蓝鲸保护计划”（Blue Whale Protection Project），需包含：
2 个具体行动（参考文中措施）
1 个创新点子（如：用 APP 宣传蓝鲸保护）
We will ______________________________________ and ______________________________________.
Also, we plan to ______________________________________ .
【答案】Task 1:
Because blue whales eat krill, and an adult blue whale can eat up to 4 tons of krill in a day.
Reason 1: People hunt them for their oil and meat.
Reason 2: The ocean is being polluted, which hurts the krill that blue whales eat.
"Protect blue whales, protect our ocean!"
Task 2:
Animal Home Special Food Actions to save them
Blue whale the ocean krill
1. Many countries have made laws to stop hunting blue whales.
2. We can help by keeping the ocean clean.
Task 3:
We will make laws to stop hunting blue whales and keep the ocean clean. Also, we plan to use social media
to spread knowledge about blue whale protection.
