Read the following article and select the best answer. Article: Wisdom teeth are normally the last teeth to appear.This usually happens when people are in their late teen years or early twenties,in other words,when they are older and wiser. Wisdom teeth can grow into place normally and never cause a problem.But often there is not enough room for them in the mouth;they might crowd other teeth.Sometimes they even push sideways through the gums . An impacted wisdom tooth is one that fails to completely rise through the gums.Wisdom teeth that only partly break through can leave space for bacteria to enter around the teeth.Infection is a risk in these cases. Wisdom teeth that are not well lined and become impacted are often removed.The American Dental Association says removal is generally advised when wisdom teeth only partly break through the gums.Removal is also advised if there is a chance that wisdom teeth ate poorly lined.The best time to remove is before the teeth cause any problems or pain.Young adults are the best candidates for wisdom teeth removal. But why do we have wisdom teeth if we often need to get them removed?One theory has to do with our diets.Scientists say the diet of ancient humans probably required more chewing teeth.Life was probably a little rougher on the teeth back then,too.So it was good to have extras. Question: The main purpose of the passage is to _ . - advise - persuade - comment - introduce
introduce

Read the following article and select the best answer. Article: Play allows children to use their creativity while developing their imagination and physical, cognitive , and emotional strength. Play is important to healthy brain development. Play allows children to create and explore a world they can master, conquering their fears while practicing adult roles. Undirected play allows children to learn how to work in groups, to share, to negotiate, and to resolve conflicts. Ideally, much of play involves adults, but when play is controlled by adults, children acquiesce to adult rules and concerns and lose some of the benefits play offers them, particularly in developing creativity, leadership, and group skills. In contrast to passive entertainment, play builds active, healthy bodies. In fact, it has been suggested that encouraging unstructured play may be an exceptional way to increase physical activity levels in children, which is one important strategy in the resolution of the obesity problem. Children's development is critically influenced by appropriate, affective relationships with loving and consistent caregivers as they relate to children through play. When parents observe their children in play or join with them in child-driven play, they are given a unique opportunity to see the world from their children's vantage point as the child navigates a world perfectly created just to fit his or her needs. The interactions that occur through play tell children that parents are fully paying attention to them and help to build enduring relationships. Parents who have the opportunity to look at their children's world learn to communicate more effectively with their children and are given another setting to offer guidance. Less verbal children may be able to express their views, giving their parents an opportunity to gain a fuller understanding of their perspective. Quite simply, play offers parents a wonderful opportunity to engage fully with their children. Play is essential to the academic environment. It ensures that the school setting attends to the social and emotional... Question: Compared with undirected play, play which is controlled by adults _ . - doesn't benefit the children at all - doesn't help develop leadership and group skills - makes children become more active - helps increase physical activity levels
doesn't help develop leadership and group skills

Q: Read the following article and select the best answer. Article: The World Health Organization estimates that more than 4 million people die each year from the effects of smoking tobacco . That number is increasing. WHO officials expect 150 million people to die from tobacco use in the next twenty years. Seven in ten of those deaths will be in developing countries. These numbers are frightening. Yet people around the world continue to smoke. It is not easy to stop smoking. However, doctors say you will live longer if you do stop smoking. You will feel better and look better. You will also protect the health of family members who breathe in your smoke. The American Cancer Society says there is not just one right way to stop smoking. It says that one method or a unit of methods may be successful. These include attending self-help programs or following directions in a book. The group says any way to stop smoking that is legal, moral and effective is worth trying. This could include taking long walks or spending time in areas where smoking is not allowed. Also, you could eat a small piece of fruit instead of having a cigarette. The American Cancer Society says the sooner smokers stop smoking, the more they reduce their chances of getting cancer and other diseases. It says blood pressure returns to normal twenty minutes after a smoker smoking the last cigarette. Carbon monoxide (CO) gas levels in the blood return to normal after eight hours. In a day, the chances of a heart attack decrease. In a year, the risk of heart disease is half that of a smoker. Question: Most people who will die from smoking are from _ . - big countries - small countries - developing countries - developed countries
A: developing countries

*Question*
Read the following article and select the best answer. Article: In many romantic movies or TV shows one scene always appears. It involves a handsome man standing outside a young woman's window, singing a love song to her to win her over. However, trying to woo a female with songs is not just something that humans do. A few animals sing love songs as well. Birds and elephants are romantic but the latest animal to _ a female might surprise you--it is the humble mouse. You may find it odd to find out that mice sing. We do not hear them because the frequency of their voice is so high. In fact, scientists have known for some time that male mice make special sounds to females, but it has always been assumed that the sounds are produced instinctively and randomly, with little thought going into the process. But new research suggests otherwise. When male mice with different voices were put in a cage together, scientists found that they would gradually change their pitches to sound like one another. But when a female mouse was put in the cage with two males, one male would change his pitch to match the other. "It was usually the smaller animal changing the pitch to match the larger animal," professor Erich Jarvis, leader of the study, from Duke University, US, told BBC News. This ability, known as vocal learning, is rare in the natural world. It had been thought to be limited to some birds, such as parrots--as well as whales and dolphins. The latest findings challenge the long-held opinion that mice cannot learn to adapt their voices. Scientists also found the part of the brain that controls the mice's singing ability. In the experiment, they damaged the cells in this part of the mice's brain and found that the animals couldn't keep their songs in pitch or repeat them any more. This also happened when the mice became deaf. Jarvis said that this finding had changed his understanding of the way mice make sound. "In mice we find that the pathways that are at least modulating these vocalizations are in the forebrain, in places where you actually find them in humans,"... Question: What do parrots, whales and dolphins have in common according to the passage? - They are all animals well-known for their smart appearances. - They are often chosen to carry out scientific experiments on. - They all have the ability to learn to adapt their voices. - Their numbers are quite limited in the natural world.
**Answer**
They all have the ability to learn to adapt their voices.