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Read the following article and select the best answer. Article: A black hole is a place in space where gravity pulls so much that even light cannot get out. The gravity is so strong because matter has been squeezed into a tiny space. This can happen when a star is dying. Because no light can get out, people can't see black holes. Space telescopes with special tools can help find black holes. The special tools can see how stars that are very close to black holes act differently from other ones. Black holes can be big or small. Scientists think the smallest black holes are as small as just one atom. These black holes are very tiny but have the mass of a large mountain. Mass is the amount of matter, or "staff", in an object. Another kind of black hole is called "stellar" . Its mass can be up to 20 times more than the mass of the sun. There may be many stellar mass black holes in Earth's galaxy. Earth's galaxy is called the Milky Way. The largest black holes are called "supermassive" . These black holes have masses that are more than one million suns together. Scientists have found proof that every large _ contains a supermassive black hole at its center. The supermassive black hole at the center of the Milky Way galaxy has a mass equal to about four million suns and would fit inside a very large ball that could hold a few million Earths. Scientists think the smallest black holes formed when the universe began. Stellar black holes are made when the center of a very big star falls in upon itself, or falls apart. When this happens, it exploded part of the star into space. Scientists think supermassive black holes were made at the same time as the galaxy they are in. A black hole can not be seen because strong gravity pulls all of the light into the middle of the black hole. But scientists can see how the strong gravity affects the stars and gas around the black hole. Scientists can study stars to find out if they are flying around, or orbiting a black hole. When a black hole and a star are close together, high-energy light is made. This kind of light cannot be seen with human... Question: According to the passage, which of the following is NOT true? - A black hole can be very tiny but extremely heavy. - The gravity of a black hole holds all light in its center. - Scientists observe high-energy light through their own eyes. - Some small black holes came into being as early as the universe.
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Scientists observe high-energy light through their own eyes.

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Read the following article and select the best answer. Article: Vienna--Although Iraq's decided to stop oil deliveries , the 11-nation Organization of Petroleum Exporting Countries (OPEC) will not increase production to make up the shortfall caused by Iraq. The 11 oil ministers decided to meet again on July 3 to discuss the effects of the Iraq temporary stop. The organization's president Charkid Khelil of Algeria said after the meeting that stocks were high and prices were stable and that quota increases were not necessary. The EU Commission has also expressed concern about Iraq's output stop. A speaker said OPEC had to take all possible measures to keep or lower the oil price. Saudi Arabia's Oil Minister Ali Al-Nuaimi had earlier said that there would not be any shortfall of oil in the market. The organization had already taken steps to fill the gap , he said. OPEC Secretary General Ali Rodriguez added that the period of the Iraq stop to export was not known, so other exporters were not going to lift quotas yet. If the market was destabilized , a suitable response would be made. Iraq stopped delivery of crude oil on Monday to protest against the UN Security Council's decision to extend the oil-for-food program by only a month, instead of the normal six-month renewal . Just before the Vienna meeting, oil prices had gone up, with a barrel of OPEC crude selling for 27.05 dollars, up from 26.81 dollars last Friday. And north sea oil was at 29.26 dollars Monday evening. OPEC wanted the oil price to stay within a margin of 22 to 28 dollars and achieved that in January and March by reducing 2.5 million barrels per day off quotas. Question: The attitude the EU Commission took towards Iraq's output stop is _ . - indifferent - concerned - passive - surprising
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concerned

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Read the following article and select the best answer. Article: It's the dieting fashion that is sweeping the world, and encourages fasting for two days of the week. But does it work? People are starving themselves to lose weight, with a dieting trend known as the "fast diet" growing in popularity. The method is also known as the 5:2 diet, and consists of eating normally for five days of a week and cutting calories to about 25 percent of normal intake during other two days. Men consume just 600 calories on the two fast days, while women are limited to 500 calories. Notably, the two fasting days should not be _ . The dieter should have at least one normal eating day in between. In the best-selling book The Fast Diet: Lose Weight, Stay Healthy, and Live Longer with the Simple Secret of Intermittent Fasting by Dr. Michael Mosley and Mimi Spencer, the two authors claim that the 5:2 diet not only promotes weight loss, but also benefits health, offering protection from disease, improved cognitive function and increased lifespan. The diet originated in the United Kingdom and became popular in the United States. Now, it is gaining popularity among the Chinese middle-class. Zhong Minghui, who is 178 cm tall and used to weigh 100 kilograms, finds fasting effective in weight control. He works in the sales department of a trade company and used to drink and eat a lot after work. After sticking to the fasting diet for five months, he managed to lose about 20 kilograms. "Actually I did not exactly rely on the 5:2 diet to lose weight. My fasting was more extreme. I almost completely cut off my supper every day and only ate some fruit. I also used an app to calculate the calories in the food I ate and was cautious of not eating any high-calorie food. I did about an hour's aerobic exercise every day. Fasting is definitely effective, but I think sports also help," he says. "I do not really believe that fasting is the magical cure-all , but my high blood sugar has improved," he adds. The US Academy of Nutrition and Dietetics says that although there is evidence that intermittent... Question: Which is the best title of the passage? - Fast diet - How to stay thin - Eating to stay healthy - The magical cure-all
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Fast diet