By now, we are all aware that social media has had a tremendous influence on our culture, in business, on the world-at-large. Social media websites revolutionized the way people communicate and socialize on the Web. However, aside from seeing your friends' new baby on Facebook, or reading about Justin Bieber's latest conflict with the law on Twitter, what are some of the real influences? Social networks offer the opportunity for people to re-connect with their old friends and acquaintances, make new friends, share ideas and pictures, and many other activities. Users can keep pace with the latest global and local developments, and participate in campaigns and activities of their choice. Professionals use social media sites like LinkedIn to enhance their career and business development. Students can work together with their peers to improve their academic and communication skills. Unfortunately, there are a few downsides too to social networking. If you are not careful, immoral people can target you for cyber bullying and disturbance on social sites. School children, young girls, and women can fall victim to online attacks which can create tension and suffering. If you are a victim of cyber bullying, do not take it lying down, but try to take appropriate legal action against the attacker. Many companies have blocked social networks as addicted employees can distract themselves on such sites, instead of focusing on work. In fact, studies show that British companies have lost billions of dollars per year in productivity because of social media addiction among employees. Also, what you carelessly post on the Net can come back to trouble you. Revealing( ) personal information on social sites can make users vulnerable to crimes like identity theft, stalking, etc. Many companies perform a background check on the Web before hiring an employee. If a potential employee has posted something embarrassing on social media, it can greatly affect their chances of getting the job. The same holds true for our relationships too,... Faced with problems caused by social media, some companies _ . A) take legal action against the attackers B) avoid posting embarrassing information C) refuse to hire potential addicted employees D) forbid the use of social networks during work time
D

When her five daughters were young, Helene An always told them that there was strength in unity . To show this, she held up one chopstick, representing oneperson. Then she easily broke it into two pieces. Next, she tied several chopsticks together, representing a family. She showed the girls it was hard to break the tied chopsticks. This lesson about family unity stayed with the daughters as they grew up. Helene An and her family own a large restaurant business in California. However, when Helene and her husband Danny left their home in Vietnam in 1975, they didn't have much money. They moved their family to San Francisco. There they joined Danny's mother, Diana, who owned a small Italian sandwich shop. Soon afterwards, Helene and Diana changed the sandwich shop into a small Vietnamese restaurant. The five daughters helped in the restaurant when they were young. However, Helene did not want her daughters to always work in the family business because she thought it was too hard. Eventually the girls all graduated from college and went away to work for themselves, but one by one, the daughters returned to work in the family business. They opened new restaurants in San Francisco and Los Angeles. Even though family members sometimes disagreed with each other, they worked together to make the business successful. Daughter Elisabeth explains, "Our mother taught us that to succeed we must have unity, and to have unity we must have peace. Without the strength of the family, there is no business." Their expanding business became a large corporation in 1996, with three generations of Ans working together. Now the Ans' corporation makes more than $20 million each year. Although they began with a small restaurant, they had big dreams, and they worked together. Now they are a big success. What can we infer about the An daughters? A) They did not finish their college education. B) They could not bear to work in the family business. C) They were influenced by what Helene taught them. D) They were troubled by disagreement among family members.
C

Just one bite of cake that is made with eggs is enough to make John feel very sick. Susan gets a terrible rash whenever she eats anything containing seafood, and David nearly died when he first ate a cookie that included peanuts. David had trouble breathing after he ate the cookie, but his mother knew what to do and she quickly gave him medicine that helped him feel better almost right away. The body's reaction to certain foods can be quite severe, resulting in breathing problems, as in David's case, or loss of consciousness for some. There are many things we eat may cause our bodies to react badly if we have a food allergy . The most common food allergies seem to be related to milk, soy, eggs, wheat flour, peanuts, nuts, and seafood. In fact, these kinds of foods account for 90% of food allergies. According to some studies, the number of children who have a food allergy is growing. But some people now argue that test results might not actually be accurate, so food allergies are not really as common as they may appear. There are three typical ways that doctors test for food allergies. Probably the most accurate way is for a doctor to give a child a food challenge", For this, the doctor watches the child eat small amounts of certain foods to see if the child has an allergic reaction or not. This method is very time consuming so it is used less often than the other two methods: skin tests and blood tests. In a skin test, a doctor puts very small amounts of the parts of the foods that the child may be allergic to under the child's skin, then watches to see if the child's skin reacts to the allergens . In a blood test, doctors take some of the child's blood and add possible allergens to it and then look for chemicals in the blood that indicate a possible allergic reaction. A problem with both the skin test and the blood test is that neither will show how severe an allergic reaction might be. If a test result is positive, the child may have a severe reaction by eating this food, but the child might just as likely... According to the passage, which test gives the most accurate results? A) The common allergen test. B) The food challenge. C) The blood test. D) The skin test.
B

Dear Sara, As we drove off from Columbia,I wanted to write a letter to you to tell you all that is on my mind.First,I want to tell you how proud we are.Getting into Columbia College shows what a great well-rounded student you are.Your academic,artistic,and social skills have truly blossomed in the last few years.Whether it is getting the highest grade in mathematics,completing your elegant fashion design,successfully selling your painted running shoes,or becoming one of the top speakers in Model United Nations,you have become a talented and accomplished young woman.You should be as proud of yourself as we are. College will be the most important years in your life.It is in college that you will truly discover what learning is about.This will be the period where you go from teacher-taught to master-inspired,after which you must become self-learner.So do take each subject seriously,and even if what you learn isn't critical for your life,the skills of learning will be important to you forever. Follow your passion in college.Take courses you think you will enjoy.Don't be trapped in what others think or say.Do your best in classes,but don't let pressure get to you.Your mother and I have no expectations for your grades.If you graduate and learn something in your four years,we would feel happy.So please don't give yourself pressure. I told your mom I'm writing this letter,and asked what she wanted me to say.She thought and said:"Just ask her to take care of herself."Please listen to your mother and take care of yourself. So please treasure your college years,make the best of your free time,and become an independent thinker;learn and grow through your successes and challenges. Love, Dad(& Mom) Sara'performance in the last few years makes his parents _ . A) annoyed B) proud C) upset D) concerned
B