Problem:OPTIONS:
- Persuasive.
- Negative.
- Objective.
- Supportive.

Read the following article and answer the question. Article: Two new studies suggest that modern running shoes could increase the risk of injuries to runners. One study involved sixty-eight healthy young women and men who ran at least twenty-four kilometers a week. The runners were observed on a treadmill machine . Sometimes they wore running shoes. Other times they ran barefoot . Researchers from the JKM Technologies company in Virginia, the University of Virginia and the University of Colorado did the study. They found that running shoes create more stress that could damage knees, hips and ankle joints than running barefoot. They observed that the effect was even greater than the effect reported earlier for walking in high heels. The study appeared in the official scientific journal of The American Academy of Physical Medicine. The other study appeared in the journal Nature. It compared runners in the United States and Kenya. The researchers were from Harvard University in Massachusetts, Moi University in Kenya and the University of Glasgow in Scotland. They divided the runners into three groups. One group had always run shoeless. Another group had always run with shoes. And the third group had changed to shoeless running. Runners who wear shoes usually come down heel first. That puts great force on the back of the foot. But the study found that barefoot runners generally land on the front or middle of their foot. That way they ease into their landing and avoid striking their heel. Harvard's Daniel Lieberman led the study. He says the way most running shoes are designed may explain why those who wear them land on their heels. The heel of the shoe is bigger and heavier than other parts of the shoe, so it would seem more likely to come down first. Also, the heel generally has thick material under it to soften landings. But the researchers do not suggest that runners immediately start running barefoot. They say it takes some training. And there can be risks, like running when your feet are too cold to feel if you get injured. The study was partly supported by Vibram,... Question: What is the writer's attitude towards the use of the modern running shoes? Answer:
****
A: Objective.

Problem:OPTIONS:
- sold handguns
- stole a handgun
- played handguns with friends
- killed his friend accidentally with a handgun

Read the following article and answer the question. Article: Over the last six years I have learned what patience is. Growing up I did not have this virtue and it is a very important virtue to have. Now I can see that if you are patient you will almost always get what you want if you are supposed to have it. I gained patience when I lost my freedom. I knew that I would eventually get it back in time. I was locked up in prison for a period of six years because at 19 years old I was playing with a handgun and I accidentally shot and killed my friend. The first couple of years was the hardest.I was always stressed out about everything.Time was dragging by because I was always paying attention to it.While I was locked up,Tom who I talked to helped put this virtue in me.He told me that it was possible that he would never make it home but that being patient and believing that one day he would was what had made him feel better.After a while I realized why he said a lot of things to me.Once I stopped paying attention to the days and just kept in mind that I would get freedom,it seemed that my time passed quickly. Now I am home and can see that patience paid off for me. I now use this virtue in my daily activities. I know that sometimes life gets hard and that it will pay in the end to stay patient and not to get discouraged. So if you are having a hard time in life,be patient and it will eventually work out one way or another. Question: The writer was put in prison because he _ . Answer:
****
A: killed his friend accidentally with a handgun

Problem:OPTIONS:
- They are amazing.
- They are common.
- They are boundless.
- They are unimaginable.

Read the following article and answer the question. Article: The oceans are unique to our planet. No other planet in our solar system has liquid water. The oceans cover about 70% of the earth's surface. They contain about 97% of the earth's water supply. Life on earth originated in the seas. The oceans continue to be home to an incredible number of plants and animals. We know very little about the oceans. Because they are so deep and dark, they are hard to study. But scientists are discovering new strange creatures all the time. We are learning more by using satellites to look at the oceans' surfaces and by using buoys ( ) to measure temperature and saltiness. Special vehicles can now travel deep into the dark oceans to see what mysteries can be discovered. More of the sun's heat is assimilated by water along the equator than at the poles. This means the water at the equator is warmer than water at the poles. These different water temperatures cause the water in the oceans to move. This is called an ocean current. The air above ocean currents also moves. The warm or cold ocean air moves over the land as wind. Oceans are also a really important part of the water cycle. Evaporation from oceans creates most of the world's rainfall. Plants on land need the rain to absorb nutrients from the soil. The oceans are also home to all kinds of sea life. These include fish, whales, dolphins, octopi, lobsters, crabs and shrimps. There are also jellyfish and starfish.Many kinds of plants, such as plankton, kelp and sea grass are part of the "forest of the seafloor." Carbon dioxide in-oxygen out! Oceans help to capture and store carbon dioxide(C02). They are the largest natural "carbon sinks" in the world. Oceans trap about1/4of the CO2 that humans put into the air. Oceans also release oxygen. Half of the world's oxygen is produced by these tiny plants! Question: What does the author think of oceans? Answer:
****
A: They are amazing.

Problem:OPTIONS:
- explain why the same object has a different weight on different stars
- compare the distance between the Milky Way and Andromeda
- show that studying dark matter could help to answer some scientific questions
- support the idea that scientists prefer to talk about mass instead of weight

Read the following article and answer the question. Article: If you look at the night sky, you'll often see stars moving very quickly. In fact, they move much more quickly than they should according to their size and the laws of physics. Scientists do not completely understand why the speed of these stars is so high. But many believe the reason is that much of the universe is made of something called "dark matter". Groups of stars called galaxies, such as the Milky Way, might even be made up of 90 percent dark matter. How much something weighs depends on where it is. The same object weighs only half as much on Mars as it does on Earth and almost three times as much on Jupiter. So scientists prefer to talk about the mass of something rather than how much it weighs, because mass does not change. They can work out the mass of galaxies by measuring the distance between them and the speed they move at. Recently, Jorge Penarrubia, a senior academic at Edinburgh University, UK, and his team discovered something interesting: The mass of the Milky Way is only half as much as the mass of another nearby galaxy, Andromeda. This seems strange, and dark matter may explain why. Finding out more about dark matter could help us understand how the universe began, but this is not easy. Lots of scientists with different types of expert knowledge are working on the problem. We can't see dark matter, it's very difficult to measure and we can't find out its mass. Unlike stars, dark matter doesn't produce or reflect light. But we can make a good guess that it is there because of the way things move and the way light bends. Experts now think dark matter may be very different from the matter that we find on Earth. There may also be five times as much dark matter in the universe as ordinary matter. Question: The author mentions the masses of the Milky Way and Andromeda mainly to _ . Answer:
****
A:
show that studying dark matter could help to answer some scientific questions