A rising population is one of the main reasons that there is global warming. Between 1650 and 1850 the population increased by 0.75 billion people going from 0.25 billion to one billion. From 1930 to the end of the century the population rose from two billion to over six billion. In just a third of the time the population rose by more than five times what it did before. It is expected that this trend in the changing population will continue and could even heighten. The growing population requires increasing amounts of energy. These energy demands and other supplies require production, which almost always involves the emission of greenhouse gases. The more the population increases the more greenhouse gases that are produced and the greater the increase in temperature. The burning of fossil fuels is one of the best-known causes for global warming. The major reason for fossil fuels contributing so much to global warming is the release of carbon that occurs during the burning of fossil fuels. When people burn fossil fuels, they release large amounts of carbon by way of the release of carbon dioxide. The carbon dioxide in the air then leads to global warming. Another source of carbon dioxide comes from _ . In forests there is a large amount of carbon that is stored in the trees and other plants. This carbon is out of the atmosphere because the trees consume the carbon from carbon dioxide. When people cut down trees, they are frequently burned. This burning releases the carbon dioxide into the atmosphere that was stored in organic matter. Even when new trees are planted, it can take up to one hundred years to make up for the carbon that was released. It is commonly thought that because trees absorb more carbon dioxide, the atmosphere experiences positive effects. Sophie Armstrong, the writer of Earth Care put it, "There's no doubt that the earth is becoming warmer because of human activity rather than a random but natural phenomenon. To sum up from the passage, it is  _    that has caused global warming. A) human activity B) sources of energy C) natural forces D) the polluted atmosphere
A


(Question)
I was waiting in line to register a letter in the post office at Thirty-third Street and Eighth Avenue in New York. I noticed that the clerk appeared to be bored with the job--weighing envelopes, handing out stamps, and issuing receipts--the same dull work year after year. So I said to myself, "I am going to try to make that clerk like me. Obviously, to make him like me, I must say something nice, not about myself, but about him." So I asked myself, "What is there about him that I can honestly admire?" That is sometimes a hard question to answer, especially with strangers. However, in this case, it happened to be easy. I instantly saw something I admired very much. So while he was weighing my envelope, I remarked with enthusiasm, "I certainly wish I had your hair." He looked up and his face was full of smiles. "Well, it isn't as good as it used to be," he said modestly. We carried on a pleasant conversation and the last thing he said to me was, "Many people have admired my hair." I'll bet that person went out to lunch that day walking on air. I'll bet he went home that night and told his wife about it. I'll bet he looked in the mirror and said, "It is a beautiful head of hair." There is one all--important law of human conduct. If we obey that law, we shall almost never get into trouble. In fact, that law, if obeyed, will bring us countless friends and constant happiness. But the very instant we break the law, we shall get into endless trouble. The law is this: Always make the other person feel important. The author commented on the clerk's hair to_. A) win his kindness B) distract his attention C) show his respect D) express his thanks
(Answer)
A


Ques: Dear Reader,  Today I am going to ask you to support Wikipedia with a donation. Wikipedia is built differently from almost every other top 50 website. We have a small number of paid staff,just twenty-three. Wikipedia content is free to use by anyone for any purpose. Our annual expenses are less than six million dollars. Wikipedia is run by the non-profit Wikimedia Foundation,which I founded in 2003.  Wikipedia is driven by a global community of more than 150,000 volunteers--all devoted to sharing knowledge freely. Over almost eight years,these volunteers  have  contributed  more  than 11 million articles in 265 languages. More than 275 million people come to our website every month to access information,free of charge and free of advertising.  But Wikipedia is more than a website. We share a common cause:Imagine a world in which every single person on the planet is given free access to the sum of all human knowledge.  _ 's our commitment. Your donation helps us in several ways. Most importantly,you will help us cover the increasing cost of managing global traffic to one of the most popular websites on the Internet. Funds also help us improve the software that runs Wikipedia--making it easier to search,easier to read,and easier to write for. We are committed to increasing the free knowledge movement worldwide,by taking on new volunteers,and building strategic partnerships with institutions of culture and learning.  Wikipedia is different. It's the largest encyclopedia    in history,written by volunteers. Like a national park or a school,we don't believe advertising should have a place in Wikipedia. We want to keep it free and strong, but we need the support of thousands of people like you.                                                                   Thank you,                                                                  Jimmy Wales All the following are the reasons for the need of your donation EXCEPT   _  . A) to keep Wikipedia free for people all over the world B) to update the software that runs Wikipedia C) to raise the salaries of the staff D) to pay the cost of running the website
Ans: C


For many in the United States,Arab-Americans are an invisible part of the population.Though Arab-Americans as a community have made great contributions to American society in fields from literature to politics to medicine,many Americans know very little about Americans of Arab backgrounds. Arab history in the United States goes back to the late 1800's when large numbers of Arab immigrants first began making their journey to a land known simply as"Amreeka". Historians generally describe Arab immigration to America in two waves.The first wave took place between 1860 and 1924.The first wave consisted of Lebanese and Syrian,and some Egyptian immigrants.These new immigrants,who were mostly Christian,came to America in search of better opportunities.Even the doomed Titanic,which set sail for America in 1912,had close to a hundred Arab passengers aboard.The majority of Arab-Americans today are descendents of the first wave of immigrants;they are the third or more generation Americans. The second wave of immigrants followed after World War II,caused by political unrest in the Middle East.This second wave of immigrants consists of mainly Arab Muslims and continues to this day. Arab-Americans make up 3 million of the population in the United States,according to demographers.And quite different from popular belief,64 percent of them are American-born.Eighty-two percent of Arab-Americans are US citizens. Arab-Americans are beyond the national average in both education and income.Education is important among Arab-Americans;82 percent have high school diplomas,36 percent have bachelor's degrees or higher,and 15 percent have graduate degrees.The-median  average income among Arab-Americans is $39 580,which is higher than the US average. What would be the best title for the text? A) Arabs in America. B) The Two Arab Immigration Waves to America. C) Arab-Americans,Contributions to America. D) Arab-Americans,Education and Income.

A