(Question)
Hi, I'm your tooth. I've been asked to represent the rest of your teeth. We need your help. We like to be clean when you show us off with your big, wide smiles. First, let me tell you a little about us. You weren't born with the baby teeth, they developed when you were about six or seven months old. You went from milk to real food in no time thanks to your twenty primary teeth. Eventually, they loosened and fell out, one at a time, probably about the time you were six or seven years old. Then we came into your life. We are your permanent teeth, all twenty-eight of us. Some people may even have thirty-two depending on those wisdom teeth in the back. Sometimes they are able to help, and sometimes they cause trouble. Many times wisdom teeth are sideways and have to be pulled. Some people don't even have them at all! On a more personal note, I am an incisor, and you have seven more just like me, here in the front of your mouth. We do the biting on those chocolate chip cookies you like so much. Next to us are the canines, four sharp teeth, two on either side. Their job is to tear food; pizza is a good one for them. Behind them are eight premolars and eight to twelve molars, depending on those wisdom teeth. The molars do the majority of the work chewing the food that you eat. They do a great job on those carrots you like so much! Did you know we not only help you bite and chew but also help you talk? That's right. Try to say "tooth" without letting your tongue touch the back of your teeth. It sounds pretty funny, doesn't it? How many teeth does a four-year-old boy usually have according to the passage? A) 20. B) 24. C) 28. D) 32.
(Answer)
A


(Question)
"Find a job you love, and you'll never work a day in your life." Do you agree with this old saying? Joanne Gordon does. She is the author of Be Happy at work and other books about careers . Gordon believes that about 30% of employees  in North America do not like their jobs, and she thinks that is terrible. She wants to help people who do not feel satisfied with their jobs find work that is good for them. Joanne says, "There are no happy jobs, only happy workers." She believes that happy workers share three main characteristics. First, happy workers enjoy the daily activities of their jobs, and they look forward to the workday. Take Tony Hawk, for example. At age 14, he became a professional skateboarder. Now he is a businessman working on projects related to skateboarding--films and video games, but he still skates every day. He once said, "My youngest son's pre-school was recently asked what their dads do for work. My son said, 'I've never seen my dad do work.'" Tony agrees that his job doesn't look like work. He has found a way to spend each day doing a job he enjoys. Second, happy workers like the people they work with. Sally Ayote says, "I work with the coolest people in the world." She and her group cook for almost 1,200 people in Antarctica. Most of these people are scientists who are doing research. Sally loves to sit and talk with them. She says, "There is no television here, no radio, so I get to know the scientists and what they're studying." Sally thinks she has a great job, and the best part about it is the people. Third, happy workers know that their work helps others. Caroline Baron's work helps people who have had to leave their home countries because of war or other dangers. She is a filmmaker who started an organization called FilmAid, which shows movies in refugee  camps around the world. Caroline believes that movies can be very helpful in these camps. For one thing, entertaining movies let refugees forget their troubles for a little while. Movies can also teach important subjects like... Who is the book, Be Happy at Work, written for? A) Joanne Gordon herself. B) Tony Hawk, Sally Ayote, and Caroline Baron. C) People who do not feel satisfied with their jobs. D) The workers who agree with the author's ideas.
(Answer)
C


(Question)
By 2050, half of the world's population will live in the tropics--the  ly warm belt that circles the globe--according to State of the Tropics, a report released today. Rapid population growth, along with economic growth, means that the region's influence will grow in coming decades, the authors of the 500-page work predict. The project, first launched in 2011, aimed to answer one significant question: Is life in the tropics improving? To find out, the researchers analyzed environmental, social, and economic indicators collected over 6 decades. It finds that the region has made "extraordinary progress" in many areas. For example, more people have access to safe drinking water, and the number of protected areas is increasing. The tropics also have outperformed the rest of the world in economic growth over the past 30 years. However, some challenges remain. Investment in research and development, for example, has increased cautiously, but tropical nations still invest less than the rest of the world. "As a proportion of GDP the Rest of the World invests almost four times as much in research and development than the Tropics." concludes the report. The report also includes a new analysis of how climate change will affect the region. Many plant and animal species are moving poleward in an attempt to stay within their preferred environmental conditions in the tropics, the authors write. However, some organisms may not be able to keep pace with the changing conditions, they predict. As a result, they can experience population declines or go extinct. In addition, an expanded tropical zone also threatens health and safety issues, the authors warn. As regions become more suitable to insects such as mosquitoes and ticks, the spread of insect-borne diseases such as malaria, dengue, and Lyme disease could rise, causing a burden to human health and the economy.  Bruna, a researcher, says he sees a lot to be concerned about in the report. "While we've made incredible advances in some areas, I think the risks for the tropics... According to the passage, we can infer  _  . A) close attention needs to be paid to the risks for the tropics. B) all the plants and animals will live in the polar region in the future. C) health and safety problems will influence the tropical development. D) Bruna shows positive attitude towards the future of the tropics.
(Answer)

A