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We all enjoy the beautiful show of colours as leaves change each autumn. But did you ever wonder how and why this happens?
Leaves are nature’s food factories. Plants take water from the ground through their roots and take carbon dioxide (二氧化碳) from the air. Plants use sunlight to turn water and carbon dioxide into glucose (葡萄糖). Glucose is a kind of sugar, which plants use as food for energy and growing.
The way plants turn water and carbon dioxide into sugar is called photosynthesis that means “ putting together with light”. A chemical called chlorophyll helps photosynthesis. It gives plants their green colour. As summer ends and autumn comes, the days get shorter and shorter, and trees “know” to begin getting ready for winter.
During winter, there is not enough light or water for photosynthesis. Trees rest during this time and live on the food they store during the summer. They begin to shut down their food-making factories.
As the green chlorophyll disappears from the leaves, we begin to see yellow and orange leaves. Small amounts of these colours have been in the leaves all along. We just can’t see them in the summer, because they are covered up by the green chlorophyll.
The bright reds and purples we see in leaves are made mostly in autumn. In some trees, like maples (枫树), glucose is caught in the leaves after photosynthesis stops. Sunlight and the cool nights of autumn turn this glucose into a red colour. The brown colour of trees like oaks (橡树) is made from waste left in the leaves.
It is the mixture of all these things that makes the beautiful colours we enjoy during autumn.
1.The word “chlorophyll” in the third paragraph means _______ in Chinese.
A．叶绿素 B．氧气 C．胡萝卜素 D．蛋白质
2.The leaves of the trees in autumn turn yellow because of the short of _____.
A．water and carbon dioxide
B．glucose and energy
C．sunlight and water
D．sunlight and carbon dioxide
3.The way that _______________________ is called Photosynthesis .
A．plants change water and carbon dioxide into sugar
B．plants turn water and carbon dioxide into sugar with the help of sunlight
C．plants use glucose as food for energy and growing
D．chlorophyll is a great help
4.Which of the following is NOT true?
A．When autumn and winter come, the days get shorter and shorter.
B．During winter trees rest and live on the food they store during the summer.
C．During winter small amounts of yellow and orange colours are kept in the leaves all the time.
D．Trees begin to stop making food in summer.
5.This passage tells us __________________.
A．all the plants can grow well with the strong sunlight
B．there are all kinds of plants on the earth
C．all the colours of the leaves aren’t made from chlorophyll
D．maples and oaks have the same reason as other trees for the change of colours
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“Dad, where are we going” was the hottest TV show last year. It was liked people of all ages.
A. as B. by C. with D. for
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Chinese people see spring flowers and the autumn moon as the most beautiful seasonal views. We enjoy the full moon during Mid-Autumn Festival.1.Flower-Worshipping Festival (花朝节) is the birthday of flowers. It started in the Tang Dynasty (AD 618-907). People celebrate it in the second lunar month, which is usually in March or April. 2.There are goddesses of flowers. Each is in the charge of a month of the year. On a flower’s birthday, people often offer incense (焚香) and spirit (烈酒) to the flower goddesses.3.People usually have fun outdoors during Flower-Worshipping Festival.4. Families have a picnic near flowers. Some may also plant some flowers.5.Girls get together and make friends. They wear flowers in their hair, catch butterflies and tie red ribbons (丝带) on tree to enjoy the flowers. They also make pretty rice cakes with flowers.
根据材料内容，将 A—E 五个句子填入文中空缺处，使短文意思通顺、内容完整，并将其标号填写在下面题号后的横线上。
A. Flower-Worshipping Festival is also a festival for girls.
B. The exact dates are different in different places across China.
C. A spring outing in the countryside is very common.
D. But do you know we also have a festival to celebrate flowers?
E. In this way, they wish for good weather and a good harvest.
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任务型阅读
How will the Internet change the world? Will we enjoy a smarter life in the future? Many of the world’s biggest Internet companies took part in an important meeting. They talked about how to build a future for our online world. The Internet can make our lives easier in many ways. The companies at the meeting showed us some of their latest technology. Here are some examples. Let's take a look.
Lip reading Machines can not only read faces. They can also read your lip movements. The Chinese Internet company Sogou has made lip reading technology. You don’t need to speak aloud. The machine turns your lip movements into voice or text. This could be very useful if you are in a noisy place and people cannot hear you on your phone. Police can also use this technology. Sometimes they see criminals on city-monitoring cameras, but they don’t know what they say. The lip reading technology can help people with this.
Smart shoes Your feet might hurt if your shoes do not fit you. This won’t happen if you wear “smart” custom-made shoes. The Xiemofang company brought a machine to the meeting. The machine scans(扫描) your feet. It records 39 parts of your feet. It even records how long each toe is. It also has a database. The database has more than 10, 000 kinds of shoes. You can choose the color and style. It also gives you suggestions for your choices. The suggestions are based on records of other people’s feet. You can get your new shoes after 10 days.
Unmanned supermarkets You walk into a supermarket, pick out your goods and go to check out. But there is no worker. There is just a tablet that says “Please smile” When you smile, it gives you a discount. Your money goes from your Alipay account to the supermarket. You don't need to do anything. The Alibaba company has made this supermarket. When you go into the supermarket, it knows your face and your Alipay account. It also knows your facial expressions. So it knows how much you like your goods. The supermarket not only makes shopping easier. It also understands you.
阅读短文，根据短文内容回答问题。
1.What did many companies mainly introduce in the meeting?
________________________________________________________________
2.Which technology could be very important to solve crimes?
________________________________________________________________
3.If you have difficulty choosing a pair of suitable shoes, what should you do?
________________________________________________________________
4.How do the unmanned supermarkets get your money saved?
________________________________________________________________
5.What do you think of having a smarter life in the future?(请自拟一句作答）
________________________________________________________________
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I hope all of you will come and actively___me in the talent show.
A.change B.support C.lift D.hug
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The charity show was very successful with the help of all the classmates, just as the old saying goes, “_______.”
A. The early bird catches the worm
B. Practice makes perfect
C. Many hands make light work
D. You cannot burn the candle at both ends
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The charity show was very successful with the help of all the classmates, just as the old saying goes, “_______.”
A. The early bird catches the worm
B. Practice makes perfect
C. Many hands make light work
D. You cannot burn the candle at both ends
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---When shall we leave for Shanghai?
---We won’t we have visited all the places of interest in Nanjing.
| A．until | B．while | C．as | D．since |
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— When shall we leave for China?
— We won’t ________ we have visited all the places of interest here.
A. until B. while C. as D. since
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— When shall we leave for China?
— We won’t ________ we have visited all the places of interest here.
| A．until | B．while | C．as | D．since |