Sometimes we may find that every week there are a lot of new stories about how climate change is affecting the planet, or new plans to battle its effects. But the concept itself isn’t new at all — in fact, scientists have been exploring questions about climate change for almost 200 years.
The idea of ''greenhouse gases'' goes back to 1824, when Joseph Fourier wondered what was regulating the earth's temperature. Fourier concluded that the atmosphere must be responsible for containing the heat absorbed from the sun and described it as a box with a glass lid: As light shines through the glass, the inside gets warmer as the lid traps the heat. As Fourier's ideas spread, it came to be called ''the greenhouse effect''.
Scientists continued to study the greenhouse effect. Not until a Swedish chemist named Svante Arrhenius came along, did scientists understand how global warming actually works. After years of work, Arrhenius determined that the level of carbon dioxide in the atmosphere did in fact have a direct effect on global temperatures.
Arrhenius found that CO2, and other gases trap radiation, which warms the atmosphere. Arrhenius was the first to suspect that burning coal could contribute to the greenhouse effect. But Arrhenius welcomed the warming effect on the planet. At a lecture later that year, Arrhenius noted that creatures of a warmer earth ''might live under a milder sky and in less barren surroundings''.
While Arrhenius' findings won him the 1903 Nobel Prize in chemistry, scientists kept debating whether the greenhouse effect was increasing until 1950, when researchers finally began to find strong data supporting it. By the end of the 1950s, American scientists had been sounding the alarm on the long-term consequences of climate change. Climate change research has come a long way since Fourier first described the greenhouse effect — still, maybe Arrhenius should have been more careful of what he wished for.
1.What does the underlined word ''it'' in Paragraph 2 refer to?
A.The climate change. B.The greenhouse effect.
C.The atmosphere. D.The heat from the sun.
2.When did the scientists first find evidence for the bad effect of global warming?
A.In 1824. B.In 1903.
C.In 1950. D.200 years ago.
3.What's the author's attitude towards Arrhenius' wish?
A.Optimistic. B.Negative.
C.Neutral. D.Ambiguous.
4.What's the main idea of the text?
A.Causes of climate change. B.Effects of greenhouse gases.
C.Findings about global warming. D.Explorations on climate change.
Drone X Pro is a shining star on the drone(无人机) market. Here's why it's gone viral.
How does Drone X Pro work？
Start by installing the Drone app to your smartphone (Android and iOS). It takes just minutes. After that, just install(安装)the battery in your drone and launch the app. You're now ready to fly your Drone X Pro！
Why is this drone so special？
The drone is about the size of a large screen smartphone. It's so small that it fits in any pocket or handbag！
Here's the best part: flying is extremely easy. There's no experience required to fly this drone. You can easily control and fly this drone，even if you've never flown a drone in your life. Flying the drone is smooth and natural as riding a bike. Our friend's son came over to the office, and he figured out how to fly the drone in just minutes. You can't imagine how stable and smooth his controls are！
Once you own this drone，you can enjoy amazing HD pictures of nature，friends，and families. It's a blast！
How much does it cost？
Now，Drone X Pro sells for ＄150 each online and two at a discount of 80％. It's a great deal！If you're not satisfied, return it and you can get your money back.
Because of the easy use，portability, low price，and small size，it's absolutely worth it！
Just imagine amazing pictures and videos you'll be taking with your new Drone X Pro. If you've never flown a drone before，this is the time to start！
Call now！ 400-800-7832 or order yours from the official website www. dronexpro. com.
1.What makes Drone X Pro different from the other drones？
A.It is easy to carry. B.It is unnecessary to install.
C.It is complex to control. D.It is expensive to afford.
2.How does the advertisement prove flying Drone X Pro easy？
A.By sharing some experience. B.By presenting a vivid picture.
C.By stating its operating steps. D.By giving a specific example.
3.How much should you pay to purchase two such drones online？
A.＄120. B.＄150.
C.$240. D.$ 300.
假如你是李华，想邀请外教Peter一起参加学校组织的春游活动，请你给他写封邮件，内容包括：
1. 活动详情：需徒步约20km，当中设有5个休息点；
2. 时间：4月26日早晨6:40校门口出发，返回时间约为下午2:00；
地点：九龙湖 (Jiu Long Lake)；
注意：1．词数80左右；
2. 可以适当增加细节，以使行文连贯；
3．不能使用真实姓名和学校名称。
Dear Peter,
_________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
Yours sincerely，
Li Hua
单词拼写
1.The books are mostly pictures, with a s_____________ version of the story for young children.
2.Canada is a country c_____________ of many different nationalities as well as foreign immigrants who make up the majority of its population.
3.Some students tend to feel a______________ before exams and that may affect their performance.
4.One reason for her preference for city life is that she can have easy a____________ to places like shops and restaurants.
5.Polly was p_____________ as to why the old man didn’t get lost in the heavy fog.
6.He was not a____________ of her presence until she spoke to him.
7.British English differs from American English in many aspects, such as spelling, grammar, v____________ and so on.
8.Pompeii, once a busy and wealthy city, was completely d_____________ in the volcanic eruption.
9.He was extremely f_____________ because he was the only one who had survived the air crash.
10.With the teacher’s patient explanation, the children have g_____________ learnt how to act properly in a drama.
阅读下面短文，在标有序号的空白处填入一个适当的词，或填入括号中单词的正确形式
The Water Splashing Festival (泼水节) of the Dai ethnic minority falls in April. It is the most important festival 1. (observe) by the Dai people in the Dehong area of Xishuangbanna, Yunnan Province.
During the festival 2.lasts three or four days, people are dressed in their best clothes and participate in a variety of rich and colorful 3.(activity). Dragon boat racing, fireworks displays and other performances such as Peacock Dance 4.(hold) on the first day. And the most popular event 5.(be) water-splashing on the second day. People splash water on each other, hoping to take away sicknesses and disasters. The wetter you get, the 6.(lucky) you will be. The last day is usually for the young people to play games as a way 7.(express) their love for each other.
The Water Splashing Festival 8.(vivid) exhibits the Dai’s respect for water and the culture of music and dance, food, and costumes. It is also a cultural bridge 9.Xishuangbanna and Southeast Asian countries that share 10.same festival culture of water-splashing.
I became a gardener when I was twelve. My early _________ of gardening may not have originated from my love for nature. It was to _________ my parents.
At that time, we had a big yard in which a beautiful maple tree stood. But my mother often looked with _________ at this work of natural art. Those golden leaves seemed like tons of rubbish to her, “something else to _________!” Seeing the neighbors busy with gardening, my father even thought it a waste of time.
At that age, I always did something _________ to whatever my parents did! If gardening were something they found _________, I would plant a garden!
I planted some lily seeds in the yard. But they failed to _________. I continued to plant sunflower seeds and roses. Wild _________ joy, I found the first rose bloom. One by one, the flowers bloomed their heads off. _________, I was touched by this land of wonder.
________, my parents showed no interest in my garden. My father even __________ at me because he found it was __________ to move around my garden to the driveway. To my mother’s __________, I put in her vase my real roses which, in her eyes, were merely weeds __________ flowers.
Regardless of their __________, I kept on planting my garden and __________ to enjoy the pleasure of gardening. Plants make such good companions: they breathe, they bloom, they __________ to care and love.
It has been many years since I made my first garden out of my desire to __________ my parent. Today I become known as Mrs. Greenthumbs, teaching gardening and hosting a gardening show, which makes my parents feel very __________. And now I could say it is my affection for __________ that makes me a real gardener.
1.A.memory B.dream C.intention D.design
2.A.please B.change C.help D.annoy
3.A.doubt B.appreciation C.surprise D.excitement
4.A.clean up B.care about C.break down D.come in
5.A.equal B.similar C.superior D.opposite
6.A.painful B.valuable C.upsetting D.interesting
7.A.break out B.come up C.reach out D.get out
8.A.with B.to C.in D.by
9.A.Luckily B.Cheerfully C.Regularly D.Eventually
10.A.Instead B.However C.Therefore D.Besides
11.A.glanced B.laughed C.shouted D.jumped
12.A.convenient B.troublesome C.enjoyable D.dangerous
13.A.sadness B.delight C.displeasure D.relief
14.A.other than B.rather than C.more than D.less than
15.A.dislike B.encouragement C.threat D.suggestion
16.A.decided B.stopped C.continued D.struggled
17.A.devote B.respond C.turn D.lead
18.A.challenge B.satisfy C.respect D.defeat
19.A.comfortable B.strange C.disappointed D.proud
20.A.freedom B.life C.growth D.nature
