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Read the article and select the best answer. Article: Teenagers around the world can be glad with the news that their brain deserves the blame when parents' orders go ignored while they tap on their smartphones. A new scientific study from the University College London has found that humans may suffer temporarily deaf when they're simultaneously focusing on something visual. Research found that the 13 volunteers experienced inattentional deafness to the normal-volume sounds playing in the background as their visual tasks became increasingly difficult. 'We found that when volunteers were performing the demanding visual task, they were unable to hear sounds that they would normally hear,' study co-author Maria Chait said in a statement. 'The brain scans showed that people were not only ignoring or filtering out the sounds, they were not actually hearing them in the first place.' The findings, published in the Journal of Neuroscience, suggest that the visual and auditory processing centers that make sense of the sights and sounds that surround us share limited resources. Inattentional deafness is a common everyday experience and the study explains why, according to UCL Institute of Cognitive Neuroscience Professor Nilli Lavie, a co-author of the study. 'This could also explain why you might not hear your bus or train stop being announced if you're concentrating on your phone, book, or newspaper. ''If you try to talk to someone focusing on a book, game, or television program and don't receive a response, they are not necessarily ignoring you, they simply might not hear you! ' she said. Loud sounds--like ambulance sirens--will still be able to break through, but some situations could become potentially dangerous when the quieter ones go unheard, according to Medical Daily. 'This has more serious implications in situations such as the operating theater, when a surgeon concentrating on their work might not hear the equipment beeping,' Lavie said. 'It also applies to drivers concentrating on complex directions as well as cyclists and motorists who are focusing intently... Question: The 13 volunteers studied in the study _ Options: A: experienced deafness due to their inattention B: were deaf to the normal sounds intentionally C: can hear the normal-volume sounds when performing the demanding visual task D: didn't choose to ignore the normal sounds on purpose
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D

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Read the article and select the best answer. Article: For hundreds of years, textbooks have put a world of knowledge in the hands of students. Paper textbooks are expensive to produce and expensive for schools to buy. Nowadays information changes so quickly that some textbooks are out of date almost before they're published. And as books are passed along from one student to the next, they get more highlighted, dog-eared, tattered, and worn. It's no secret that paper textbooks are heavy. But what you may not know is that backpack weight is an increasing problem among kids. Studies show that heavy backpacks can lead to both chronic back pain and poor posture -- and many kids are carrying a quarter of their body weight in textbooks. Today's students have grown up completely immersed in technology. iPod, iPad, computer -- these are the ways they interact with their world. They need a textbook made for the way they learn. iBooks textbooks on iPad offer a gorgeous, full-screen experience full of interactive diagrams, photos, and videos. No longer limited to static pictures to illustrate the text, now students can dive into an image with interactive captions, rotate a 3D object, or have the answer spring to life in a chapter review. They can flip through a book by simply sliding a finger along the bottom of the screen. Highlighting text, taking notes, searching for content, and finding definitions in the glossary are just as easy. And with all their books on a single iPad, students will have no problem carrying them wherever they go. McGraw-Hill, Pearson Education, and Houghton Mifflin Harcourt -- the publishers responsible for the majority of K-12 content in the US -- have created Multi-Touch textbooks available now from the iBookstore Question: What can we infer from the passage? Options: A: i Books are sure to replace the paper textbooks. B: We should pay little attention to the backpack weight. C: Some things don't get better with age, such as paper textbook. D: The students can use ipad freely.
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C

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Read the article and select the best answer. Article: There are hundreds of national parks and wildlife areas in Africa that you can travel to. Here are the top four travel destinations in Africa: Tanzania----Serengeti National Park During the annual migration , when the wildebeests and zebras pack up and leave their living areas to find fresher ones, the Serengeti is an astonishing place to be. It's a very good travel spot in Africa at other times of the year too, but the migration has been ranked by many as one of the wonders of the natural world. Kenya----Masai Mara National Park If you want to see the big cats, this wildlife park is the best of the best. Lion, leopard and cheetah abound and they are relatively easy to spot because of the grassland vegetation which means you get good views for miles around. Another big plus is the fact that going off road is allowed and it is a big advantage because the animals will rarely oblige you and stay next to the major roads. South Africa-Kruger National Park For the variety of species no other places in Africa can come close to the Kruger Park. And because it is so large it has a number of different ecosystems that you can pass through in your search for animals and birds. It is one of the best managed parks in Africa and the accommodation is well-equipped, too. Zambia-South Luangwa National Park South Luangwa is a diamond in the rough, just waiting for enough exposure to bring it to its rightful place in the crown of prime Africa trips. It has been regarded as one of the best places in Africa to see the special leopard and it is the birthplace of the walking travel. Question: In which parks can visitors see leopards? Options: A: Serengeti National Park and Krunger National Park. B: Masai Mara National Park and South Luangwa National Park. C: Krunger National Park and South Luangwa National Park. D: Serengeti National Park and South Luangwa National Park.
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B