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Unit 5
The power of plants
Within a plant
prep. 在（建筑或地区）里
1. Plants can’t speak, but they have amazing power! _________ can grow 91cm just in one day. That’s very fast!
2. A lot of our ________ comes form plants.
3. Plants can also keep us ________, just like doctors! We use different plants to make ________.
Bamboo
food
healthy
medicine
What can plants do for us?
竹子
药品
Match the words with the parts of the plant.
flower
stem
root
leaf
What can you see in the picture?
Do you know the names of its parts?
A plant.
Stem(茎，梗，柄), root(根), and leaves(叶，叶子).
stem
root
leaf(leaves)
What can you see in the picture?
What is the picture about?
What does plant mean?
植物进行光合作用(photosynthesis)
plant n. 植物;
发电厂;工厂
mesophyll cell
叶肉细胞
water
carbon dioxide
oxygen
sugar
sunlight
Look at the picture of a plant and match the words to it.
sugar
leaf
water
sunlight
n. 糖
n. 阳光
叶绿体
mesophyll cell
叶肉细胞
Read the passage and match the main idea with each paragraph.
Paragraph 1
Paragraph 2
Paragraph 3
Paragraph 4
Paragraph 5
Plants produce substances(物质).
How plants work.
Introduce the Worker No. 55.
The importance of plants.
Workers in plants will have a rest.
water
carbon dioxide
oxygen
sugar
sunlight
1. Can you find Worker No. 55 in the picture?
2. What is he going to do ?
He is going to start work in the plant.
Read Paragraph 1 and answewr
3.Are there any workers in the plants?
No, there is no worker in the plant.
4.Why does the writer use “worker” in the passage?
The writer uses personification(拟人手法) to make the passage more vivid（生动的） and easier for the readers to understand.
Read Paragraph 1 and Think
2.What time is it?
It’s quarter past seven.(7:15)
Read Paragraph 2 and answewr
1. Where does No.55 worker work?
2. How many workers in each workshop?
3.What do they do?
In workshop 1001 in the leaf.
There are 20 to 100 workers.
They collect sunlight and C???????? during the day.
They send up water.
They will mix water, C???????? ,and sunlight.
?
Further thinking
Worker is actually a chlorophyll (叶绿素)
Workshop is actually a chloroplast (叶绿体)
Read Paragraph 3 and answewr
2. Which product is important for animals and humans? Why?
Oxygen is important for animals and humans.
Because they need it to breathe.
1.What do the “workers in the Leaf” do?
A. Send up water
B. Produce sugar and oxygen
C. Take a rest at noon
D. Work in the Root
Read Paragraph 4 and answer
Why will workers take a rest in dark?
Because there isn’t sunlight during the night, so the workers stop working.
Light affects(影响) photosynthesis(光合作用).
A. A worker’s daily work in a factory
B. The parts of a plant and their jobs
C. How to count workers in a workshop
D. Why animals need oxygen
Choose another suitable title and give your reasons.
What does “plant” mean in the title?
plant n. 工厂
The word “plant” has two meanings. One is about the living thing. The other is about the place the workers work in.
plant n. 植物
A pun (双关语) is a word with more than one meaning. It’s a clever way to make the passage more interesting.
同音双关
???? No eye deer → No idea（不知道）
同形双关
????Sign: Fine for parking 好的停车 = 停车罚款（小误会）
多义双关
???? Computer’s snack: microchips 芯片 = 小薯片（电脑爱吃）
英语中最常见的双关是同音双关和多义双关。
同音双关: 利用读音相同或相近但意义不同的词语表达不同语意。
e.g. A bicycle can't stand on its own because it is two-tyred. (two-tyred是too tired的同音双关)
多义双关: 利用一个词的多重含义表达不同语意。
e.g. Broken pencils are pointless.
(pointless有“无用的”和“没有尖头的”双重含义)
Complete the texts with the words and expression from the passage.
Sunlight and CO2
come into the _______.
Water from the root will ________ to the leaf through the stem.
________, CO2 and sunlight will turn into _______ and oxygen. Oxygen is important to humans — they need it to _________.
leaf
rise up
Water
sugar
breathe
What do the pronouns refer to?
Time.
Worker No. 55.
Workers.
Workers in the Leaf.
Sugar.
Oxygen.
Animals and humans.
Oxygen.
Oxygen.
Time.
The workers.
Plants.
一般将来时
during接时间段
...到...（范围）
上升到
rise up固定短语，表 “上升
输送
对...有用
很多
修饰[U]n.
v.呼吸
→n.breath
努力工作
休息
数百万
英语时间表达：顺读法 & 逆读法
顺读法（直读法）：最基础、通用的表达，直接 “小时 + 分钟” 的顺序朗读，适用于所有时间点
规则：
整点：小时 + o'clock（o'clock 可省略，口语中常用）
非整点：直接读小时数字 + 分钟数字
时间
英文表达
中文释义
7:00
七点
9:15
九点十五
12:30
十二点半
4:58
四点五十八
seven (o'clock)
nine fifteen
twelve thirty
four fifty-eight
英语时间表达：顺读法 & 逆读法
逆读法（间接法）
借助 past（过）和 to（差）来表达，仅适用于分钟数 ≤ 30 或 ＞ 30 的情况
规则：整点：小时 + o'clock（o'clock 可省略，口语中常用）
非整点：直接读小时数字 + 分钟数字
时间范围
结构公式
关键说明
分钟数 ≤ 30
分钟数 + past + 小时数
表示 “几点过几分”
分钟数 ＞ 30
(60 - 分钟数) + to + (小时数 + 1)
表示 “差几分到下一点”
15 分钟
用?quarter?代替 fifteen
15 分钟 = a quarter
30 分钟
用?half?代替 thirty
30 分钟 = half
时间
逆读法表达
中文释义
备注
7:15
七点十五
15 分钟用 quarter
8:30
八点半
30 分钟用 half
9:20
九点二十
分钟≤30，用 past
10:40
差二十分到十一点
分钟＞30，用 to
5:50
差十分到六点
分钟＞30，用 to
3:15
三点十五
整点后的 15 分钟
a quarter past seven
half past eight
twenty past nine
twenty to eleven
ten to six
a quarter past three
Now workers from the Root send up water. The water will rise up to the Leaf 1 the Stem. Then workers in the Leaf will mix water, CO? and sunlight. They will produce sugar — it’s useful 2 the growth of the plant. Another product is oxygen. It means a lot 3 animals and humans.
A. through B. across C. over
A. to B. for C. with
A. in B. on C. to
解析：
“through the Stem” 表 “穿过茎（内部）”，是文章原搭配，选 through；
“useful for sth.” 是固定搭配（“对某事有用”），选 for；
“mean a lot to sb.” 是文章原短语（“对某人很重要”），选 to。
一、时态填空（用所给词的适当形式填空）
It’s quarter past seven. Worker No. 55 is going to start (start) work in the plant.
Workers in the Leaf collect (collect) sunlight and CO? every day.
The water will rise (rise) up to the Leaf through the Stem soon.
What are they going to produce (produce) with water, CO? and sunlight?
二、介词填空
Workers in Workshop 1001 work in the Leaf.
They collect sunlight and CO? during the day.
Water rises up to the Leaf through the Stem.
The oxygen means a lot to animals and humans.
The sugar is useful for the growth of the plant.

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