*Question*
Read the article and select the best answer. Article: Cancer researchers urged people on Wednesday to take more vitamin D to lower risk of cancer, saying studies showed a clear link. "Our suggestion is for people to increase their intake, through diet or a vitamin supplement," Dr. Cedric Garland said in a telephone interview. Garland's research team reviewed 63 studies, including several large long-term ones, on the relationship between vitamin D and certain types of cancer worldwide between 1966 and 2004. "There's nothing that has this ability to prevent cancer," he said, urging governments and public health officials to do more to fortify foods with vitamin D.Garland is part of a University of California at San Diego Moores Cancer Center team that published its findings this week online in the American Journal of Public Health. Vitamin D is found in milk, as well as in some fortified orange juice, yogurt and cheeses, usually at around 100 international units (IU) a serving. People might want to consider a vitamin supplement to raise their intake to 1000 IUs per day, Garland said, adding that it was well within the safety guidelines established by the National Academy of Sciences. The authors said that taking more vitamin D could be especially important for people living in northern areas, which receive less vitamin D from sunshine. African Americans, who don't produce as much of the vitamin because of their skin colour, could also benefit significantly from a higher intake, the authors said. Question: According to the passage, people are advised to take more Vitamin D because _ . Options: A: it is nutritious B: it can't harm people's health C: it is not taken enough every day D: it can lower cancer risk
**Answer**
D

*Question*
Read the article and select the best answer. Article: Teaching is more than leadership. Some of the teacher's time and effort is directed toward instruction, some toward evaluation. But it is the teacher as a group leader who creates an effective organizational structure and good working environment so that instruction and evaluation activities can take place. A group that is totally disorganized, unclear about its goals, or constantly fighting among its members will not be a good learning group. The leadership pattern includes helping to form and _ a positive learning environment so that instruction and evaluation activities can take place. On the first day of class, the teacher faces a room filled with individuals. Perhaps a few closely united groups and friendships already exist. But there is no sense of group unity, no set of rules for conduct in the group, no feeling of belonging. If teachers are successful leaders, they will help students develop a system of relationships that encourages working together. Standards and rules must be set to keep order, make sure of justice and protect individual rights, but do not contradict school policy. What happens when one student hurts another's individual rights? Without clear regulations agreeable to the students and teachers, the classroom can become chaotic. Students may break rules they did not know existed. If standards are set without participation from the class, students may spend a great deal of creative energy in destroying the class environment or finding ways to break rules. No matter how skillful the teacher is in uniting students and creating a positive atmosphere, the task is never complete. Regular maintenance is necessary. Conflicts arise. The needs of individual members change. A new kind of learning task requires a new organizational structure. Sometimes outside pressures such as holidays, upcoming tests or sport competitions, or family troubles cause stress in the classroom. One task for the teacher is to recreate a positive environment by helping students deal with conflict, change, and stress. Question: According to the author, the teacher should _ . Options: A: free students from outside pressures B: set the standards and rules on his own C: be responsible for a well-organized class D: focus more on instruction and evaluation
**Answer**
C

*Question*
Read the article and select the best answer. Article: World top-ranked badminton player Lin Dan said last Friday that he was a better player than Taufik Hidayat in the year of 2006 despite losing the Asian Games single title to the Indonesian Olympic champion. "I have ranked No.1 in the world for two straight years and I think people can easily come to a conclusion on who is a better player for the whole year," said Lin Dan, also known as Super Dan in the badminton world because of his marvelous performance in the sport. Hidayat beat Lin 21-15, 22-20 to give Indonesia its second gold medal in Doha on December 9, retaining his Asian Games singles title and avenging two losses to the badminton world champion. Lin, 23, led China to the men's team title after defeating Hidayat twice in three days, in the preliminary round and in the semifinals of the Asian Games. In their third meeting, Lin came up against a better-prepared Hidayat than he had encountered previously. Hidayat was cheered on by the noisy support from dancing and flag-waving Indonesian fans, who had converted the badminton arena into a national celebration even before the two players stepped onto the court. There's been a lot of acrimony between Hidayat and Lin, who this year won the single title in the world championships after former champion Hidayat crashed out in the quarterfinals. In Doha, Hidayat was quoted as calling Lin "arrogant" before the event began, but the two stars played down the rift (a situation where two people dislike each other). "It's no problem, we're close friends," said Hidayat. "The media _ it." Lin said last Friday in Beijing that he and Hidayat remain friends despite all the rumors . "There is no problem between Taufik and me although we don't talk to each other very much," said Lin. "Media tends to make up things in order to make their stories juicy." Question: What is the best title for this passage? Options: A: Opponents Become Good Friends B: True Friendship C: World Top-ranked Badminton Players D: Who Is a Better Player?
**Answer**
D

*Question*
Read the article and select the best answer. Article: WASHINGTON----Chinese Vice-President Xi Jinping arrived at Andrews Air Force Base in Washington,February 13,2012.Vice-President Xi Jinping said he would explore important problems in an active and practical manner with his America hosts on Monday during his five-day official trip here after arriving at Andrews Air Force Base in the afternoon. In a written statement given upon his arrival,Xi said as the international situation experiences complex and complete changes,China and the United States have more extensive common interests and shoulder more important common responsibilities on the present world stage. The purpose of the current visit is to "carry out the important _ reached by President Hu with President Obama during his visit to the United States in January last year and to advance the building of the China--US cooperative partnership based on mutual respect and mutual benefit",said Xi. According to Xi,bilateral relations have moved forward in spite of some twists and turns during the past several decades. "This has brought enormous benefits to our two countries and two peoples,and has had a positive, far-reaching impact on peace,stability and the prosperity of the Asia-Pacific region and the world at large". Xi said that"whether we can seize opportunities,tackle challenges and build a cooperative partnership at the new historical starting point matters to the future of our two countries and the world as a whole." Xi said he looks forward to engaging in extensive dialogue and exchanges with Americans from various sectors to enhance cooperation and strengthen friendship. Xi is scheduled to meet US senior government officials,including Henry Kissinger,Brent Scowcroft,Zbigniew Brzezinski,Madeleine Albright and Henry Paulson this evening to listen to their advice on China-US ties. Meetings between Xi and US Vice-President Biden and President Obama are scheduled on Tuesday. Question: According to tile passage,bilateral relations between China and US have experienced _ . Options: A: enormous dialogues B: extensive exchanges C: rnany challenges D: various hardships
**Answer**
D