Read the following article and select the best answer. Article: "Children should not be left unsupervised to play with a dog." say experts in this week's British Medical Journal. Their advice is part of a review aimed at doctors who deal with dog bites. "Dog bites and maulings are a worldwide problem, particularly in children." write Marina Morgan and John Palmer. Every year 250,000 people who have been bitten by dogs attend minor injuries and emergency units in the United Kingdom, and half of all children are reportedly bitten by dogs at some time, boys more than girls. Accurate death figures are difficult to obtain, but in the past five years, two to three cases a year have made news headlines. Based on the latest medical evidence, _ advise doctors how to examine and treat a patient presenting with a dog bite. They discuss the risk of infection and when to refer to specialist care. For travelers bitten abroad, they suggest assessing the risk of rabies . In terms of prevention, they suggest that children should be taught to treat dogs with respect, avoid direct eye contact, and not tease them. They should be taught not to approach an unfamiliar dog; play with any dog unless under close supervision; run or scream in the presence of a dog; pet a dog without first letting it sniff you; or disturb a dog that is eating, sleeping, or caring for its babies. "Dog owners also need to change their behavior", says Rachel Besser, a children's doctor and lifetime dog owner, in an article. "It is clear that not all dog owners appreciate that children should not be left unsupervised with a dog", she says. Just as some parents are obliged to take parenting classes, she would like to see compulsive classes for expectant dog owners to teach them about the responsibilities of dog ownership. Educational programs are also needed to teach children about some precautionary behaviors around dogs. Finally, she would like to see animal doctors advising dog owners about bite prevention, and doctors promoting bite prevention when treating patients who have been bitten by dogs. Question: What are Rachel Besser's words mainly about? - It's necessary to teach children how to raise dogs. - Children should be taught not to play with dogs. - All the dog owners would like to attend classes on caring for dogs. - Some dog owners would like children to be left unsupervised with a dog.
Some dog owners would like children to be left unsupervised with a dog.

Read the following article and select the best answer. Article: Encouraging pupils to keep noise to a minimum should be a valuable component of all children's education, according to new research. Dr. Helen Lees, from Stirling University's school of education, says that "enforced silence" is seen as a punishment and often acts to _ children's natural ability. But she says that teaching children about the benefits of "enforced silence",--- deliberate stillness that gives them the opportunity to focus and reflect in a stress-free environment--- can have a significant effect on pupils' concentration and behavior. It is the latest in a string of researches to establish a link between the classroom environment and pupils' academic ability. A study almost a decade ago in London found that children's exam results were cut by as much as a third if they were taught in noisy classrooms. Teaching unions have also called for a limit of 26degC to be put on classroom temperatures because teachers and pupils struggle to work in hot conditions, and some educationalists claim that too much clutter on classroom walls can prevent children from concentrating. Dr. Lees said, "When we take some research on school settings and put it all together, what we see is that education without silence does not make much sense. In areas of better learning outcomes, better self- confidence and well-being measures, enforced silence in a person's life and an individual's education is shown throughout the relevant research to be a benefit." Dozens of schools across Britain have already introduced periods of "reflective silence" into the timetable. Kevin Hogston, head of Sheringdale Primary, south London, has just introduced a minute's silence at the start of twice-weekly meetings in which children are taught breathing techniques and encouraged to reflect. The school plans to introduce it into classrooms every day. Question: What can be inferred from the research on school settings? - Students are more active if taught in noisy classrooms. - Silence makes a great difference to pupils. - Clutter on the walls can help students concentrate. - Most schools are not satisfactory in terms of classroom temperatures.
Silence makes a great difference to pupils.

(Q).
Read the following article and select the best answer. Article: We've all heard the story of Three Little Pigs. The third pig foiled the hyperventilating wolf by building his house out of bricks, rather than with straw or sticks as his brothers had done. Less commonly known is that the pig later improved his home's safety profile by installing convex security mirrors at key points along the driveway. Well, why not? In the current issue of Animal Behaviour, researchers present evidence that domestic pigs can quickly learn how mirrors work and will use their understanding of reflected images to scope out their surroundings and find their food. The researchers cannot yet say whether the animals realize that the eyes in the mirror are their own, or whether pigs might rank with apes, dolphins and other species that have passed the famed "mirror self-recognition test" thought to be a marker of self-awareness and advanced intelligence. The finding is just one in a series of recent discoveries from the nascent study of pig cognition . Other researchers have found that pigs are brilliant at remembering where food stores are cached and how big each stash is to the rest. They've shown that Pig A can almost instantly learn to follow Pig B when the second pig shows signs of knowing where good food is stored, and that Pig B will try to deceive the pursuing pig and throw it off the trail so that Pig B can hog its food in peace. They've found that pigs are among the quickest of animals to learn a new routine, and pigs can do circus worth of tricks: jump hoops, bow and stand, spin and make word like sounds on command, roll out rugs, herd sheep, close and open cages, play videogames with joysticks, and more. For better or worse, pigs are also slow to forget. "They can learn something on the first try, but then it's difficult for them to unlearn it," said Suzanne Held of the University of Bristol. "They may get scared once and then have trouble getting over it." Question: Pigs can play all the tricks, except _ . - herd sheep - play video games with joysticks - sing and dance - bow and stand
(A).
sing and dance