While dog keepers realize their dogs can read their moods accurately, scientists have always been a little doubtful. Now thanks to some researchers at the University of Veterinary Medicine in Vienna, Austria, we finally have some convincing evidence.

    For their study, biologist Corson Miller and his team exposed eleven selected dogs to digital images of women that were either angry or happy. Half the dogs were rewarded for touching the screen when shown a happy face, while the other half got their treat for selecting those that appeared angry.

    Interestingly, the dogs were not provided with the entire face. Some dogs were shown only upper halves while the others observed lower halves. That's because the scientists believe humans show their emotions on their entire face.

    After some training like how to recognize small differences like the wrinkles between the eyes or the changes in their shape that accompany the happy or angry expressions, the dogs were mostly able to identify the correct expression not only on a familiar face but on a strange face. The researchers concluded the dogs were smart enough to read human emotions.

    They also found those being trained to read angry expressions took a longer time to learn. They guess it may be because dogs find angry faces disgusting, causing them to withdraw quickly. However, once the smart dogs realized they were getting rewarded, the trepidation seemed to disappear. In fact, the dogs had such a good time playing the computer "game" that scientists had a hard time keeping them away from the touch screens after the study was completed.

    The researchers also noticed only dogs with a male owner had a harder time understanding the expressions correctly. Since the touchscreen models were all females, this confirmed what has been observed in previous studies—dogs are more efficient at reading facial expressions of people that are the same gender as their owner.

阅读下列短文，从每题所给的四个选项 （A 、B 、C  和 D ）中，选出最佳选项。

    Most people have heard of Shakespeare and probably know something of the plays that he wrote. However，not everybody knows much about the life of this remarkable man，except perhaps that he was born in the market town of Stratford upon Avon and  that he married a woman called Anne Hathaway. We know nothing of his school life. We do not know，for example，how long it lasted，but we presume that he attended the local grammar school，where the principal subject taught was Latin.

    Nothing certain is known for what he did between the time he left school and his departure for London. According to a local legend，he was beaten and even put in prison for stealing rabbits and deer from the estate of a neighboring landowner，Sir Thomas Lucy. It is said that because of this he was forced to run away from his native place. A different legend says that he was apprenticed to a Stratford butcher，but did not like the life and for this reason decided to leave Stratford.

    Whatever caused him to leave the town of his birth，the world can be grateful that he did so. What is certain is that he set his foot on the road to fame when he arrived in London. It is said that at first he had no money or friends there，but that he earned a little by taking care of the horses of the gentlemen who attended the plays at the theatre. In_time ， as he became a familiar figure to the actors in the theatre，they stopped and spoke to him. They found his conversation so brilliant that finally he was invited to join their company.

    Kaitlin Woolley and Ayelet Fishbach report in Psychological Science that a meal taken "family-style" from a central plate can greatly improve the outcome of later negotiations.

    Having conducted previous research in 2017 revealing that eating similar foods led to people feeling emotionally closer to one another, Dr Woolley and Dr Fishbach wondered whether the way in which food was served also had a psychological effect. They theorized that, on the one hand, sharing food with other people might indicate food scarcity（短缺）and increase a feeling of competition. However, they also reasoned that it could instead lead people to become more aware of others' needs and drive cooperative behavior as a result. Curious to find out, they did a series of experiments.

    For the first test they recruited 100 pairs of participants from a local cafe, none of whom knew each other. The participants were seated at a table and fed tortilla chips with salsa. Half the pairs were given their own basket of 20 grams of chips and a bowl of 25 grams of salsa, and half were given 40 grams of chips and 50 grams of salsa to share. As a cover for the experiment, all participants were told this snack was to be consumed before the game began.

    The game asked the participants to negotiate an hourly wage rate during a fictional strike. Each person was randomly assigned to represent the union or management and follow a set of rules.

    The researchers measured cooperation by noting the number of rounds it took to reach an agreement, and found that those who shared food resolved the strike significantly faster（in 8. 7rounds）than those who did not（13.2 rounds）. A similar experiment was conducted with 104

participants and Goldfish crackers（饼干）, this time negotiating an airline's route prices. The results were much the same, with the food-sharers negotiating successfully 63. 3%of the time and those who did not share doing so 42. 9%of the time.

    Professor Martin's report says that children who attend a number of schools, because their parents have to move around the country, probably make slow progress in their studies. There are also signs, says Professor Martin, that an unusually large number of such children are mentally affected.

    The professor says, "It's true, my personal feeling is that children should stay in one school. Our feelings are based on research and not on any personal feeling that I or many assistants may have on the subject."

    Captain Thomas James, an army lecturer for the past 20 years and himself a father of two, said, "I've never heard such rubbish. Taking me for example, no harm is done to the education of my children who change school regularly—if they keep to the same system, as in our Army school. In my experience—and I've known quite a few of them—Army children are as well-adjusted (适应) as any others, if not better. What the professor doesn't appear to appreciate is the fact that in such situations children will adapt (适应) much better than grown-ups."

    When this was put to Professor Martin, he said that at no time has his team suggested that all such children were backward or mentally affected in some way, but simply that in their experience there was a clear tendency (倾向).

    "Our findings show that while the very bright child can deal with regular changes without harming his or her general progress in studies, the majority (大多数) of children suffer from constantly (不断地) having to enter a new learning situation."

Libraries

    Public libraries

    Most towns in Britain have a public library. A library usually has a large selection of books and other resources, which library members can use and borrow for free.

    Britain's First Public Library

    The first public library in Britain opened in Manchester in1852. It's first librarian was a man called Edward Edwards, Edwards attended the library's opening ceremony and two famous writers called Charles Dickens and William Thackeray were there too.

    How to Join a Library

    To join a library, go to your local library and fill in a form. You'll receive a library card which is needed when using library services.

    Mobile Libraries

    Not everyone can get a library. Some people live far away from towns and cities. Other people find it difficult to go out because they have an illness or a disability. Thanks to mobile libraries, these people can still borrow books.

    Unlike most libraries, which store books in buildings, mobile libraries usually keep their books in a mini-bus. The back of the mini-bus has shelves for the books, and it is big enough for borrowers to step inside and look around. A driver takes the mini-bus to a certain place at a certain time, so people know when to expect it. They can then return their books and borrow some more.

    All Aboard the Library!

    A school in London didn't have space for a library inside the building. However, everybody agreed that it was still important to have a school library. So the head of the school, Graham Blake decided to park an old bus on the school car park and changed it into a library. Pupils helped to paint the bus, and after eight months, the new library was ready.

    I am afraid of heights but two summers ago I climbed to a high place. Most of our high school had come along on a day trip to a beautiful beach village in Peru. After eating our lunches, many of us wanted to make the climb to an area around the village.

    Do I turn back? "Yes!" Will I regret (后悔))it later? I really want to get to the top, but... At last, I decided at least to have a try.

    My friend Tom was in front of me. Then, suddenly, he slipped (滑倒))and was about 10 feet back! My heart was beating faster until he stopped himself. Knowing that my friend Seth would be right behind me, I began the climb. I was soon past the first challenge safely, but not feeling much better about the rest of the climb. Looking down, I saw rocks everywhere. My breathing sped up, and my heart beat even faster, growing loud in my ears.

    My friends kept climbing. But they did not forget me. Someone was always behind me to help hold my feet when necessary, and someone else was always in front to offer a hand up. With friends helping me by words and actions, I slowly gained ground.

    Then we came to the worst part. The climb looked very close to vertical (垂直的). To me, the wise choice was to go back down. Melody encouraged me to go on and she made it safely first. I stopped, unsure of my footing. "You can do it, Jean! I'm right here," Melody called. She waited patiently, not asking me to hurry. I took a few deep breaths and kept climbing.

    With no more mistakes, we came to the top finally. I was dirty and tired. But it didn't matter. I was at the top! I had never felt so alive.