Just as the world’s most respected scientific bodies have confirmed that the world is getting hotter, they have also stated that there is strong evidence that humans are driving the warming. Countless recent reports from the world’s leading scientific bodies have said the same thing. For example, a 2010 summary of climate science by the Royal Society stated that: “There is strong evidence that the warming of the Earth over the last half-century has been caused largely by human activity.”
The idea that humans could change the planet’s climate may be counter-intuitive, but the basic science is well understood. Each year, human activity causes billions of tons of greenhouse gases to be released into the atmosphere. As scientists have known for years, these gases hold heat that would otherwise escape to space, wrapping the planet in an invisible blanket.
Of course, the planet’s climate has always been changing thanks to “natural” factors such as changes in solar or volcanic activity, or cycles relating the Earth’s going around the sun. According to the scientific literature, however, the warming recorded to date matches the pattern of warming we would expect from a build-up of greenhouse gas in the atmosphere – not the warming we would expect from other possible causes.
Even if scientists did discover another reasonable explanation for the warming observed so far, that would beg a difficult question. As Robert Henson puts it in The Rough Guide to Climate Change, “If some newly discovered factor can account for the climate change, then why aren’t carbon dioxide and the other greenhouse gases producing the warming that basic physics tells us they should be?”
The only way to prove with 100% certainty that humans are responsible for global warming would be to run an experiment with two identical Earths – one with human influence and one without. That obviously isn’t possible, and so most scientists are careful not to state human influence as an absolute certainty. In most scientists’ opinion, the global warming is mainly caused by ________.
| A．solar activity |
| B．volcanic activity |
| C．the Earth’s going around the sun |
| D．human activity |
. The text is developed by ________.
| A．giving typical examples |
| B．following the order of space |
| C．analyzing a theory and arguing it |
| D．comparing and finding differences |
The underline word “identical” means ________.
| A．totally different |
| B．exactly the same |
| C．extremely important |
| D．relatively independent |
Which of the following can be the best title?
| A．Are All the Scientists Really Scientific? |
| B．Where Is Global Warming Leading Us to? |
| C．Are Humans Definitely Causing Global Warming? |
| D．What’s Relation of Global Warming and Greenhouse Gases? |
Why do people drink too much, eat too much, smoke cigarettes or take drugs? What’s to blame for all the bad behavior? Most people would say that, while these self-destructive acts can have many root causes, they all have one obvious thing in common: they are all examples of failures of self-control, lacking the will power to resist them.
According to a recent study, however, if you really think about it, something about that simple answer doesn’t quite make sense. In fact, it turns out that sometimes it’s having will power that really gets you into trouble.
Think back to the time you took your very first sip of beer. Disgusting, wasn’t it? When my father gave me my first taste of beer as a teenager, I wondered why anyone would voluntarily drink it. And smoking? No one enjoys their first cigarette — it tastes awful. So even though smoking, and drinking alcohol or coffee, can become temptation(attraction) you need will power to resist, they never, ever start out that way.
Just getting past those first horrible experiences actually requires a lot of self-control. Ironically (讽刺的是), only those who can control themselves well, rather than give in to them, can ever come to someday develop a “taste” for Budweiser beer, Marlboro cigarettes, or dark-roasted Starbucks coffee. We do it for social acceptance. We force ourselves to consume alcohol, cigarettes, coffee and even illegal drugs, in order to seem experienced, grown-up, and cool.
These bad habits aren’t self-control failures — far from it. They are voluntary choices, and they are in fact self-control successes. Self-control is simply a tool to be put to some use, helpful or harmful. To live happy and productive lives, we need to develop not only our self-control, but also the wisdom to make good decisions about when and where to apply it.What do most people think causes bad behavior?
| A．Being forced by others. | B．Not having enough will power. |
| C．Enjoying their first experiences. | D．Following the examples of their friends. |
The author mentions his experience in the third paragraph to prove ____.
| A．will power helps develop bad habits sometimes |
| B．drinking beer is harmful to the health of teenagers |
| C．self-control should be developed when one is young |
| D．everyone can be challenged by different temptations |
In the last paragraph, the author stresses(强调) that ____.
| A．without self-control, no one can succeed |
| B．bad habits don’t always lead to bad results |
| C．applying self-control correctly is important |
| D．people can develop wisdom from bad behavior |
What would be the best title for the passage?
| A．My First Sip of Beer | B．Do You Have Will Power ? |
| C．Will Power Benefits Us | D．Dark Side of Self-control |
To Whom It May Concern:
On March 5, 2012 , I bought a Perfect Muffin Kit from your store at Midfield Shopping Center. The cashier who assisted me was George. George was very friendly and told me that the Perfect Muffin Kit would live up to the guarantee on the box: “Perfect Muffins Every Time!”.
Unfortunately, this product did not live up to what it promised . The muffins I made were far from perfect . I followed the directions in the package very carefully . First , I removed the bag of mix from the box. Then , I poured it into a bowl. Next, I added the correct amount of water to the mix and stirred it. According to the directions, after stirring the mixture , I added half a cup of dried grapes, nuts , berries, or another favorite ingredient . My favorite ingredient happens to be hot sauce . I find that a bit of hot sauce makes pizza and soup taste very delicious. So, continuing to follow the directions, I added half a cup of hot sauce to the mix and stirred it. Finally, I poured the mix into muffin tins and baked it in the baker at 350 degrees for exactly 20 minutes.
When the muffins finished baking, I was very excited to eat the “Perfect Muffins” as promised on the box. You can imagine my disappointment when, upon tasting the muffins, I discovered that they were not perfect. These muffins were , in fact , absolutely terrible. Not even my dog was interested in eating these supposedly “perfect” muffins.
I would appreciate a full refund( money to be returned) of $3.99 for this product as soon as possible. Enclosed are the receipt, the empty box, and one of the un-perfect muffins so that you can experience it for yourself . Thank you for your attention to this matter.
Sincerely，
Michelle BauerThis letter is most likely addressed to _______.
| A．a local storeowner |
| B．the owner of the muffin mix company |
| C．the clerk at a local muffin bakery |
| D．George, the cashier who sold the muffin mix |
The tone(语气 ) of the author can best be described as ________.
| A．embarrassed | B．hopeless | C．disappointed | D．disgusted |
The author was unhappy with the product because________.
| A．the directions of the product contained a mistake |
| B．it was not up to the promise made on the box |
| C．it was too difficult to follow the directions |
| D．it was worth less money than she paid for it |
The author’s main purpose in writing this letter is to ________.
| A．prevent others from making the same mistake |
| B．persuade the company to change the wording on their box |
| C．get back all the money paid from the shop |
| D．complain about how bad the muffins tasted |
Churchill's full name was Winston Leonard Spencer Churchill. He was born in 1874. He was educated at Harrow School and the Royal Military College, Sandhurst.
In 1900 Churchill was elected a member of parliament .As First Lord of the Admiralty , in 1911, he was responsible for strengthening the British navy.
During World War I, he still remained a member of parliament, but he resigned from his post in the British navy, and became a soldier again, fighting in France. In 1917, however, he became Minister of Munitions . In this job, he encouraged the development and use of the tank, which was then a new weapon. After the war, Churchill held several government posts.
From 1931 to 1939, he was only a member of parliament. He had fallen into dislike because of his militant (war-loving) attitude. Even his closest friends discouraged him from seeking higher office. But when World War II started in 1939. Churchill returned to his former job as First Lord of the Admiralty.
In May 1940, he became Prime Minister. Throughout the war, Churchill showed great strength and energy. He worked for long periods with little sleep and traveled many thousands of miles. By the courage and determination expressed in his speeches, he inspired the people of Britain to keep on fighting. His speeches also gave hope to people in parts of Europe occupied by enemy forces.
In the general election at the end of the war, the Conservative Party, of which he was leader, was defeated. But he became Prime Minister again in 1951. He resigned as Prime Minister in 1955. However, he remained a member of parliament until 1964. Some time later, in 1965, he died.Before World War I, Churchill worked for his country as ____.
| A．headmaster of Harrow School | B．a leader of the Britain Navy |
| C．a leader of the Conservative Party | D．Prime Minister of Britain |
How many times was Churchill elected Prime Minister?
| A．One. | B．Two. | C．Three. | D．Four. |
What can we learn from Para. 4?
| A．In 1938 Churchill left the parliament. |
| B．Churchill's closest friends were against his attitude toward war. |
| C．Churchill's closest friends always inspired him to seek higher office. |
| D．Churchill and his closet friends served in the army before World War II. |
We can know all the following from the text EXCEPT that ____.
| A．Churchill gave up as Prime Minister in 1955 |
| B．Churchill once became a soldier, fighting in France |
| C．Churchill's speeches encouraged the British people to keep on fighting |
| D．Churchill led his army to fight bravely and defeated the enemy in World War I |
In the year 1986 there was a terrible explosion(爆炸). The explosion was at a nuclear power plant(核电站) in Ukraine. The radiation(辐射) caused a lot of damage. It polluted the soil and other things. People were living in the area when the explosion happened. More than twenty years later those people are still suffering. The influence of the explosion will go on for a long time.
Over two million people still live in that area. Only 56 people died from the explosion but many other problems have been caused because of it. Some types of cancer are more than 200 times above the world average(平均水平). Many children have cancer now and children born with problems have doubled since the accident.
Some people in the United States are worried about the children living in the explosion area. One group has been trying to raise money. They are called the Chenobyl Children’s Project. They want to bring children from Ukraine to the U.S. each summer.
A spokesperson for the group says that radiation is the highest in the summertime so it is a good time to get the children out of the country. They want to help the children get away for a little while. The Project wants them to be safe from radiation.
It costs $1,500 to bring each child to the United States for six weeks. The group raised enough money to bring 28 children to the United States last year. The children were able to do lots of fun things. They enjoyed clean air, healthy food, and plenty of outdoor fun. One little nine-year-old girl who got to come to the United States said that she likes America.
The spokesperson says that the children that come to America during the summer miss less school when they return home because they have a long summer vacation.What can we learn about the explosion that happened in 1986?
| A．Children suffering from cancer have doubled since the accident. |
| B．More than 200 people died in the accident. |
| C．The influence of the explosion will last for more than 20 years. |
| D．Millions of people still live in the area where the explosion happened. |
Why does the group bring children to the U.S. in summer?
| A．Because the radiation is the highest in summer. |
| B．Because children have a long summer vacation. |
| C．Because the U.S. is the most beautiful in summer. |
| D．Because traveling in the U.S. in summer costs the least. |
Which of the following is TRUE about the Project?
| A．It brings 28 children to the U.S. every summer. |
| B．It lets children stay in the U.S. for six weeks. |
| C．It teaches children useful outdoor skills. |
| D．It mainly raises money in Ukraine. |
What does the underlined word in Paragraph1 mean?
A. effort B affect C. offer D. effect
Young people and older people do not always agree with each other. They sometimes have different ideas about living, working and playing. But in one special program in New York State, adults (成年人) and teenagers live together in a friendly way.
Each summer 200 teenagers and 50 adults live together for eight weeks as members of a special work group. Everyone works several hours each day. They do so not just to keep busy but to find meaning and enjoyment in work. Some teenagers work in the woods or on the farms near the village. Some learn to make things like tables and chairs and to build houses. The adults teach them these skills.
There are several free hours each day. Weekends are free, too. During the free hours some of the teenagers learn photo-taking or painting. Others sit around and talk or sing. Each teenager chooses his own way to spend his free time.
When people live together, rules are necessary. In this program, the teenagers and the adults make the rules together. If someone breaks a rule, the problem goes before the whole group. They talk about it and ask, “Why did it happen? What should we do about it?”
One of the teenagers has something to say about the experience, “You stop thinking only about yourself. You learn how to think about the group.” In one special program in New York, young and older people ______.
| A．are friendly to each other. |
| B．teach each other new ways of building houses |
| C．live together but do not work together |
| D．spend eight weeks together, working as farmers |
Living together, ________.
| A．the teenagers have to obey the rules the adults make |
| B．the members don’t have to obey the rules |
| C．the members are not allowed to break the rules they make together |
| D．the members have no free time except on weekends |
The last paragraph shows that the teenager thinks his experience in the program is _______.
| A．disappointing | B．helpful | C．tiring | D．unpleasant |
The best title for the passage is _______.
| A．Rules of Living Together | B．Different Ideas about Living |
| C．Teenagers and Adults Together | D．Life in New York State |