Read the article and select the best answer. Article: Nearly all of today's Native Americans in North, Central and South America can trace their ancestry to just six women whose descendants immigrated around 20,000 years ago, a DNA study suggests. The finding does not mean that only these six women gave rise to migrants who crossed into North America from Asia in the earliest population of the continent.Rather, it suggests that only six left a particular DNA legacy that persists to today in about 95% of Native Americans, said study co-author Ugo Perego in Utah. "The women did not necessarily arrive together, nor even all live at the same time," he said.Results indicate the women arrived sometime between 18,000 and 21,000 years ago. The work was published this week by the journal PLoS One.Perego is from the Sorenson Molecular Genealogy Foundation in Salt Lake City and the University of Pavia in Italy.The work confirms the previous indications of just six maternal lineages, as well as a date of around 20,000 years ago when the first people in North America arrived after crossing a land bridge from Asia, Perego said. The researchers studied mitochondrial DNA, which is passed only from mother to daughter.They created a "family tree" that traces the different DNA _ found in today's Native Americans.By noting mutations in each branch and applying a formula for how often such mutations arise, they calculated how old each branch was.That indicated when each branch arose in a single woman. The six "founding mothers" obviously did not live in Asia because the DNA signatures they left behind are not found there, Perego said.So they probably lived in Beringia, the now-submerged land bridge that stretched to North America, he said. Question: What is the passage mainly about? Options: A: A study indicates that women arrived in America around 20,000 years ago. B: A study indicates six women gave rise to migrants of America. C: A DNA study tells about people who crossed into North America from Asia. D: A study indicates Native Americans can trace their ancestry to just six women.
D

(Question)
Read the article and select the best answer. Article: It is a novel that is probably more talked about than read. People think: "It's such a big book! It has such a serious theme!" The feeling that they are going to be taught a long, hard lesson often puts readers off. But really, War and Peace (1869), which tells the stories of five upper-class families in Russia at the time of the 1812 French invasion, is not to be missed. Reading this novel is one of those once-in-a-lifetime experiences, like climbing the Great Wall: You will regret it if you do not try. Earlier this month, USA Today reported that a six-episode War and Peace miniseries produced by the BBC would air next year. With a complex plot and so many characters, readers unfamiliar with the work might be most interested in the characters from the financially-troubled Rostov family of Moscow. Count Rostov has four teenage children. Natasha is in love with Boris Drubetskoy, who is about to become an army officer. Nikolai Ilyich loves the poor Sonya, a ward of the family, but his family is not happy with their relationship. The proud Vera is about to start a happy marriage with a German-Russian officer. The youngest Rostov is the 9-year-old Petya, who, like his brother Nikolai, has his heart set on fighting for his country. The lives of all are about to be changed by the upcoming great war that involves many other major characters of War and Peace, such as Prince Andrei, who goes into a military career partly in order to get away from his unhappy marriage to the socialite Lise. The novel has a great reputation among many kinds of writers and millions of readers. US writer Ernest Hemingway wrote: "I don't know anybody who could write about war better than Tolstoy did." A comment by the great 20th-century Russian short-story writer Isaak Babel shows the rich sense of history that Tolstoy's work conveys. "If the world itself could write, it would write like Tolstoy," Babel commented. Question: Why do people prefer to talk about the novel rather than read it? Options: A: The story is directly related to their daily life. B: The story is too long and has too serious a theme. C: They often get confused with the complex relationship. D: They can understand the story through shared ideas.
(Answer)
B

Ques: Read the article and select the best answer. Article: Christian Eijkman, a Dutch doctor, left the Netherlands for the island of Java. Many people on the island had a disease called beri-beri. He was going there to try and find a _ . At first, Eijkman thought some kind of germ caused beri-beri. He raised some chickens. He didn't eat them, but made experiments on them. The local people were quite surprised at that. One day he noticed that his chickens became sick when they were fed the food most Javanese ate -- refined white rice . When he fed them with unrefined rice, also known as brown rice, they recovered. Eijkman realized that he had made an important discovery -- that some things in food could prevent disease. These things were named vitamins . The Javanese were not getting enough vitamins because they had actually removed the part that contains vitamins. Later, other diseases were also found to be caused by the lack of vitamins in a person's food. Today many people know the importance of vitamins and they make sure they have enough vitamins from the food they eat. If they don't, they can also take vitamin pills. Question: We can learn from the passage that _ . Options: A: beri-beri was caused by chickens B: Christian Eijkman's experiment was successful C: the Javanese didn't like vitamins D: the Javanese's disease was caused by a kind of germ
Ans: B

Question: Read the article and select the best answer. Article: It's difficult not to become involved in gossip at work. After all, people like gossip and interesting bits of information: you only have to look at the number of celebrity-focused publications to realize that we have a huge appetite for discussing other people's lives. At work, however, this type of interaction is harmful and costly. It wastes time, damages reputations, promotes divisiveness , creates anxiety. Rumors often grow because people like to be "in the know." Knowledge is power, and that's why the people with the least amount of power in an organization can often be the ones to start and spread rumors. It can make them feel important if they're seen to know things that others don't. This knowledge is at the center of why and how rumors start and spread. Insufficient knowledge or incomplete information are often to blame. Consider these examples: *People don't know why a colleague was fired, so they make up a reason based on some limited knowledge or insignificant fact. "I saw John override the cash register the other day without a supervisor present. Maybe he stole some money and that's why he went." *People see a pattern of behavior between two individuals and they add their own explanation. "Joseph and Samantha spend a lot of time together after hours 'catching up on paperwork.' And just yesterday, they were sitting awfully close to each other in the meeting. I bet paperwork isn't all that's getting done after work!" These rumors are typical of the things you'll face at work, and they spread because of a lack of accurate information. So, the best way to fight rumors is with good communication. When you communicate well, your team knows what's happening, and they trust that you'll keep them informed. Good communication within your team also means that you will become aware of any rumors that are starting, and you'll be able to address them quickly and effectively. Question: Who is most likely to spread rumors at work? Options: A: The ones who have a large circle of friends B: The ones who have quick access to information. C: The ones who have good knowledge. D: The ones with the least amount of power.
Answer:
D