Americans have developed an olive oil habit. Out to dinner recently, I saw a man dipping his white bread in olive oil and then pouring it all over his salad, saying, "Wow, this is so good for me!" But is olive oil the healthiest fat? No, it's not. You might ask, doesn't it lower cholesterol ? Well, only when you substitute olive oil in equivalent amounts for butter or oils that are higher in saturated fat. Olive oil doesn't lower cholesterol; it just doesn't raise it as much. You may be better off with canola  oil. The 1999 Lyon Diet Heart Study found that a Mediterranean diet significantly reduced heart attacks and premature deaths. Many people attributed this to eating a lot of olive oil. But it was increased consumption of canola oil that accounted for these improvements. Also, study participants ate more whole-grain bread, vegetables, fish and fruit, and less meat. Butter and cream were replaced with man-made butter made from canola oil, which has more healthy omega-3 fatty acids than olive oil does. Another study found that olive oil reduced blood flow by 31%. Canola oil and fish oil don't. (You want to increase blood flow to all body parts.) I like the taste of olive oil, and I use it sometimes. It's a healthier fat than many others, but it's not nearly as healthy as canola oil -- or fish oil and flaxseed oil, for that matter, which also have lots of omega-3s. And a tablespoon of any oil has 126 calories. Think about that before you pour it on. According to the author, olive oil   _  . A) isn't as health as most people think B) can be used as a substitute for meat C) can help increase the blood flow D) contain less calories than other oils
A

A MILLION people on Mars within 100 years. This is the brave vision   of Elon Musk, the founder of the space technology company SpaceX. "We need to be laser-focused   on becoming a multi-planet civilization. That's the next step," he said in a recent interview with Aeon magazine. Musk expects to see about 80,000 people living on Mars by 2040. It's all about protecting the human race from extinction, according to Musk. The Earth has always been a ticking   time bomb. As the sun begins to die, it will grow bigger, becoming what is known as a Red Giant. In 500 million years, the sun will have become large enough to kill off any plant and animal life on Earth, according to US scientist Edward Guinan. In a billion years, the Earth will have become a hot planet with little or no water. The brave dream of getting the human race to Mars is not only Musk's; others have made plans, too. A Dutch entrepreneur set up the Mars One foundation in 2011, hoping to be the first project to put humans on Mars. It received over 200,000 applications to become part of the first group of astronauts to go there. According to Mars One, "human settlement on Mars is possible with existing technologies." Water, food, energy, and oxygen are needed for life anywhere. According to Mars One, water that was still in the Martian soil would be boiled and taken out. By using a process called "electrolysis", astronauts could split   water into hydrogen   and oxygen for breathing. Astronauts on the International Space Station have already done similar things. Food can also be grown in space. Certain plants such as lettuce and onions can be grown using LED light for different color spectrums   and much less heat. NASA has been researching this to prepare for visiting Mars. But how will people get there? The Mars One project plans to use SpaceX's Dragon capsule as part of its mission. But it is rumored   that Musk already has a design in mind for a giant spaceship. He calls it the Mars Colonial Transporter. We can infer from the article that the author is   _   human settlements on Mars. A) doubtful of B) strongly against C) optimistic about D) uninterested in
C

College students constantly hear the praises of education.We have all become used to believing that a college education is always a guarantee of an easier life.I was nine years old when my fourth-grade teacher presented me with a task, to write down all of the things I wanted in my life.I filled my paper with things like: own a big house and have servants; be rich and have a good job.The next day my teacher handed back my paper and in red ink she wrote: " GO TO COLLEGE." For a long time, I was convinced that once I obtained an education, BAM! Life would be easier. However, education cannot promise all wishes, dreams, and desires.Society must reject the foolish idea that a college education's main purpose is to satisfy our desires and secure success.Like most challenging things, education is a gamble   in which results depend entirely on people's ability to look past their wants to see the realism and reason behind their wants. For instance, my first year of college, I took a sociology class.In class, we were taught that Third World countries were poor.We learned that our quality of life would be almost impossible for an average person in those countries.I began to examine my own desire to be rich.To always go after money felt selfish when knowing others had none at all.Learning about other society's financial situations forced me to look beyond what I wanted. Through the process of education, everything once desired is tested.Wanting something no longer is enough; it's more important to examine why we want it and whether we really want it.When my desire for money changed, everything changed.I stopped longing for money-driven careers and stopped valuing the people who had them.I began to examine the things I purchased and my reason for wanting them. Education is a tool to be used to develop and advance our desires, so we can discover the things that are truly significant in life.Education is a source to expand our society to see beyond the superficial   appeals and the "quick fixes" , leaving the belief of an... The author's fourth-grade teacher probably agreed that   _  . A) the author was an ambitious student B) the author should set more realistic goals C) a college student would lead an easier life D) a college degree was the key to the author's dreams

D