We each have a unique genetic (,) make-up. Every cell of your body has the same set of about 100,000 separate genes made of DNA. These are the instructions for producing a person. Genes decide everything from the colour of your skin to the way your brain works. You have one of several billion combinations of DNA which come from the random mixing of your parents' genes. Except for identical twins , no one has the same combination as another person. You are unique! You are unique in another way too: in the way you are raised and all the experiences you have from before birth to adult life. These experiences influence you, your behaviour and attitudes, and the choices you make. But are genes or life experiences more important in shaping your appearance and personality? Scientists are studying twins to find out. One set of twins occurs every 70 births---some are identical and others are non-identical twins. Identical twins are special because they share exactly the same genes and often the same environment. Non-identical twins are more like ordinary brothers and sisters. Some identical twins have been adopted and brought up in different homes. With identical genes but a different home environment, scientists can study twins to see how much a particular feature depends on the genes we inherit. For example, we know that eye problems, like short-sightedness, are mostly genetic. But resistance to pain is largely dependent on experiences. Genes also influence our eating habits. Identical twins brought up apart often like to eat at the same time of day and feel full after eating the same amount. Non-identical twins in similar circumstances have more varied eating habits. Identical twins are also more likely to follow the same patterns for marriage and divorce than non-identical twins. Scientists are trying to identify the different genes that influence our behaviour. Some people are thrill-seekers and get into risk-taking and adventurous activities. They take up extreme sports like bungee jumping and possibly take... Why are scientists studying twins? A) To find out how many twins are born every year. B) To discover what shapes us as individuals. C) To compare differences between twins. D) To study brother-and-sister relationships.
B
(Question)
Once a father was seated at the dinner table with his wife and children. A good friend who had come to visit was eating with them. While they were sitting there the clock struck twelve,and the stranger saw the door open and a very pale little child dressed in snow-white clothes come in. It neither looked around,nor did it speak,but went straight into the next room. Soon afterwards it came back,and just as silently went out of the door again. On the second and an the third day it came back in exactly the same manner. Then the stranger finally asked the father, whose beautiful child it was that went into the next room every day at noon. "I did not see it,"he said,adding that he did not know whose child it might be. The next day when it again came,the stranger pointed it out to the father, but the latter did not see it,nor did the mother and the children see anything. Then the stranger got up,went to the door of the room,opened it a little,and looked in. There he saw the child sitting on the floor, and busily digging and rooting about in the cracks in the floor. When it saw the stranger, it disappeared. He now told what he had seen and described the child exactly.Then the mother recog- nized it, and said,"Oh,it is my dear child who died four weeks ago." They ripped up the floor and found two farthings which the child had once received from its mother to give to a poor man. It,however, had thought,"with that money you can buy yourself a piece of zwieback,"and had kept the farthings,hiding them in the cracks in the floor.www.ks5u.com Therefore it had had no rest in its grave,and had come every day at noon to look for these farthings. Then the parents gave the money to a poor man,and after that the child was never seen again. In the passage the writer use"it" to refer to the child instead of "he",because _ . A) the child is lovely B) the child is so young that we can't know he is a boy or a girl C) the child isn't. a person alive D) the friend doesn't know who is the child
(Answer)
C
Ques: Kewen Lichadson is thirty two years old now. He works in the Lasailian Park in the South Africa, where many wild animals such as lions, tigers, leopards and wolves are living. When you get there you may have a chance to see him playing with these wild animals without anything to protect himself except a small bag of pepper . Sometimes he would go swimming with them side by side. It is reported that nearly all the wild animals are brought up by him even from the time they were six months old. For so many years he has cared for them day and night that they have made great friendship between them. "Sometimes if I could not get home at night I would stay with these animals throughout the night. It's quite warm and safe." He often says to the reporter. "Compared with animals, the human beings are less trusted." he may go on. "You needn't have to worry about whether these wild animals could make a secret attack from the back, but for the human beings I can't give you a good answer because, I believe, they are more cunning ." When asked why, he would tell you, "I'm not a talented animal tamer, you know. But I believe, like any of us they have their own feelings. Instead of sticks, whips or iron chains , I treat them with as much patience and respect as possible. Perhaps this might be dangerous but for me this is not a kind of job but love." From the passage we can see Kewen Lichadson _ . A) trusted human beings more than animals B) trusted animals more than human beings C) trusted neither human beings nor animals D) trusted both animals and human beings
Ans: B
Question: Researchers found that people become happier and experience less worry after they reach the age of fifty. In fact, they say by the age of eighty-five, people are happier with their life than they were when they were eighteen years old. The findings came from a survey of more than three hundred forty thousand adults in the United States. The Gallup Organization questioned them by telephone in two thousand eight. At that time, the people were between the ages of eighteen and eighty-five. The researchers asked questions about emotions like happiness, sadness and worry. They also asked about mental or emotional stress. Arthur Stone in the Department of Psychiatry and Behavioral Science at Stony Brook University in New York led the study. His team found that levels of stress were highest among adults between the ages of twenty-two and twenty-five. The findings showed that stress levels dropped sharply after people reached their fifties. Happiness was highest among the youngest adults and those in their early seventies. The people least likely to report feeling negative emotions were those in their seventies and eighties. The findings appeared in the Proceedings of the National Academy of Sciences. Researchers say they do not know why happiness increases as people get older. One theory is that, as people grow older, they grow more thankful for what they have and have better control of their emotions. They also spend less time thinking about bad experiences. Professor Stone says the emotional patterns could be linked to changes in how people see the world, or maybe even changes in brain chemistry. The researchers also considered possible influences like having young children, being unemployed or being single. But they found that influences like these did not affect the levels of happiness and well-being related to age. The study also showed that men and women have similar emotional patterns as they grow older. However, women at all ages reported more sadness, stress and worry than men. We can learn from the research that _ . A) only when people get older, will they feel happier B) older people usually have no worries in their life C) older people are more likely to be thankful in life D) stress levels among the youngest are the highest of all
Answer:
C