Co-operation means working together for the benefit of all. Without co-operation modern society could not exist. Co-operation has at its best among the farmers in the dry areas of certain parts of Australia and Africa. The fields have been irrigated（灌溉）in these areas. Crops cannot be grown without water. For this purpose, canals（运河）and reservoirs have been built. The canals have been cut through the fields of not only one farmer. Those who live higher up the valley than the others have permitted canals to be built through their land in order to carry water to the fields of farmers lower down. When there is a long period without rain, all share the water. Instead of taking all the water for themselves, the farmers in the higher land leave enough water for their neighbors down the valley. Farming in the dry areas has been made possible by such co-operation. By co-operation farmers have learned to make even the desert produce crops.

1．Co-operation means              .

A．working for others

B．working for oneself

C．working together for the interests of all

D．working together for the benefit of the whole world

2．In dry weather the farmers who live higher up the valley              .

A．share the water with their neighbors

B．keep all the water for themselves

C．build canals across the fields of other farmers

D．work hard to store water

3．Crops can be produced in desert only because              .

A．there is a lot of rain

B．there is one reservoir

C．the people work together for the benefit of all

D．many wells have been found

4．Farmers have dug the canals through             .

A．the fields of many farmers                    B．the fields of only one farmer

C．the whole desert                      D．many valleys

Two years ago my grandmother was going to turn 75. My family discussed what the best way to celebrate was. Should we throw her a party? Should we take her on a trip? We remembered that she had touched so many people's lives, and there were so many people for her to consider. Then someone got the idea that we should include everyone in the celebration by turning it into a tribute(献礼) to my grandmother.x k b 1 . co m  We secretly sent out letters to the people in Grandmother's address book and asked them to send a letter with a memory that they had shared with her. People sent us letters with poems, stories and pictures. The deep feeling that was shared through the response surprised us. We compiled(编辑)these letters into a memory book and amazed her with it on the morning of her birthday.
The unusual thing about my grandmother's friends was not the number that she had, but the connection they shared. In many ways this book of friendship was the greatest achievement of my grandmother's life.
I believe that developing true friendships is one of the most important things that anyone can do in one's lifetime. It is not a matter of the number of friends one has, but the quality of the bonds. If one has had at least one true friendship before dying, then one can say one has lived a successful life. I have made many friends and I believe I have begun to develop the same types of friendships my grandmother kept up over her lifetime. I only hope that I will be as successful as she has been.
【小题1】How did the author's family celebrate Grandmother's birthday ?

阅读下面短文，根据所读内容在表格中的空白处填入恰当的单词。注意：每个空格只填一个单词。
Time, a faithful company of our life, is a universal topic. People are always curious about what it is, how it travels and who it meets.
Stephen Hawking, one of the world’s smartest physicists, once said. “I’m fascinated by time.”
Many of us are, and the popularity of time travel novels, movies and TV series has proved that. After Palace and Startling by Each Step achieved astonishing ratings last year, Palace 2 aired on January 20, attracting time travel fans back to TV.
Woody Allen’s movie Midnight in Paris achieved great success. It was nominated for Best Picture, Directing, Original Screenplay and Art Direction for the 2012 Academy Awards.
Dream of heroism
Time travel TV series and movies connect both today and the past, thus offering room for imagination. Imagination creates a chance for the young to fulfill a dream that is hard to achieve in reality.
Chinese writer Xi Juan is a pioneer of time-travel stories in China. In 1993 she published a love story about a young woman time traveling to ancient times. The leading role’s modern personality and perception of love help her win the heart of a cool, handsome martial art master. Such a plot satisfies female fans’ love fantasy.
Starting from the late 1990s, novels about men traveling back to the past prevailed (盛行), with a Step into the Past as the most popular example. In these stories, the male leading roles accomplish great things with their modern skills and wisdom.
It is usually “a dream of heroism come true”, along with enviable romances.
Eye candy
“I’m hooked by the shows because they are characterized by dramatic and poetic love and have eye-pleasing actors,” Xia Xiaoyan, who works for a foreign-owned enterprise in Shanghai, explained her love for time travel TV series.
Her comment echoes a 2011 survey by Creat Marketing Research Co Ltd in China. When asked about what is so appealing about time travel TV series, 21 percent of respondents answered, “These attractive characters.”
A bigger reason behind the popularity of time travel stories, however, is the relaxation they offer, according to the survey.
Cai Yinong agrees. “Many people are facing tremendous pressure in their fast-paced lives, so this genre is more relaxing than other shows as it provides people with a terrific outlet to escape reality,” Cai told China Daily.
Cultural homesickness
“Which dynasty would you like to live in if you could travel to the past?” asked a survey launched by Shanghai University and Shanghai Social Sciences Association last December.
About 60 percent of the 2,543 respondents chose Tang Dynasty, while Qing Dynasty, and the Spring and Autumn and Warring States periods were the other top two destinations.
The survey results reflects people’s definition of the good days: prosperous economy and culture, steady society, fair and uncorrupted politics, and opening up to the outside world.
As for the movie Midnight in Paris, it features modernity versus cultural homesickness. The New York Times commented, “The past seems so much more vivid, more substantial, than the present. The good old days are so attractive because we were not around, however much we wish we were.”

We might like to think we're not influenced by other people, but a new study into the group-buying mechanisms（机制） - like those used on coupon（优惠券） sites such as Groupon and LivingSocial - reveals that telling buyers who come later to the offer how many have already signed up increases the number of purchasers.
Researchers at the University of Toronto's Rotman School of Management wanted to understand why group buying sites that have entered the market recently have enjoyed greater success than those operating a decade ago, such as Mercata and MobShop.
Earlier attempts typically left potential buyers waiting for days before confirming whether or not they had got the offer they had signed up for.
“We think one of the reasons group-buying has been successful recently is because of the short time horizon,” says Rotman Professor Ming Hu, who co-wrote the study with Professor Mengze Shi and PhD student Jiahua Wu. “It allows for a herding effect.”
Another reason is the use of an information structure that discloses to later arrivals how many have already signed onto the deal.
Researchers looked at two ways of designing the purchasing mechanism for a group buy:a simultaneous mechanism, where no one knows how many buyers have come before them, and asequential（连续的） mechanism, where a second group of buyers has the advantage of knowing the size of the first group.
The researchers' analytical（分析的） model shows the most successful mechanism is the sequential one because it eliminates uncertainty for those coming later to the deal, and improves the confidence of those who sign on early, as they're able to track the numbers of those who come after them.
“That boosts confidence,” says Professor Hu, who teaches operations management. Deals for "luxury" services, versus everyday items, work better in a group buy scenario（方案） because they offer consumers a greater benefit.
【小题1】It can be learned from the text that ______.

请认真阅读下列短文，并根据短文的内容要点完成文章后的表格。注意：补全填空应符合语法和搭配要求，每空只填一个单词。

Happiness is U-shaped, for we are happier at the start and end of our lives but hit a slump when we are middle-aged, British and US researchers say.

Economists from the University of Warwick, central England, and from Dartmouth College, New Hampshire, looked at data on the mental health of two million people from 80 countries.

In Britain, the probability of depression for men and women peaks at around 44 years of age, Warwick University said in a press release.

In the United States, though, there was a big difference between men and women.

Among women, unhappiness peaked at around the age of 40, whereas among men, it was about 50.

But the U-shape of happiness is constant around the world, and mid-life depression takes place  regardless of marital status, changes in job or income.

The study appears in Social Science & Medicine, published by the Dutch publishing house Elsevier.

"It happens to men and women ,to single and married people, to rich and poor and to those with and without children." said co-author Andrew Oswald.

One possibility may be that people realize they  won't achieve many of their aspirations at middle age, the researchers said.

Another reason could be that after seeing their fellow middle-aged peers begin to die, people begin to value their own remaining years and embrace life once more.

But the good news is that if people make it to aged 70 and are still physically fit, they are on average as happy and mentally healthy as a 20-year old.

"For the average persons in the modern world, the dip in mental health and happiness comes on slowly, not suddenly in a single year," Oswald said. "Only in their fifties do people emerge from this low period,"

Title: People happiest at start and end of lives, but slump in middle