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Read the following article and select the best answer. Article: Many scientists today are convinced that life exists elsewhere in the universe---life probably much like that on our own planet. They reason in the following way. As far as astronomers can determine, the entire universe is built of the same matter. They have no reason to doubt that matter obeys the same laws in every part of the universe. Therefore, it is reasonable to guess that other stars, with their own planets, were born in the same way as our own solar system. What we know of life on earth suggests that life will arise wherever the proper conditions exist. Life requires the right amount and kind of atmosphere. This eliminates all those planets in the universe that are not about the same size and weight as the earth. A smaller planet would lose its atmosphere; a larger one would hold too much of it. Life also requires a steady supply of heat and light. This eliminates double stars, or stars that flare up suddenly. Only single stars that are steady sources of heat and light like our sun would qualify. Finally, life could evolve only if the planet is just the right distance from its sun. With a weaker sun than our own, the planet would have to be closer to it. With a stronger sun, it would have to be farther away. If we suppose that every star in the universe has a family of planets, then how many planets might support life? First, eliminate those stars that are not like our sun. Next eliminate most of their planets; they are either too far from or too close to their suns. Then eliminate all those planets which are not the same size and weight as the earth. Finally, remember that the proper conditions do not necessarily mean that life actually does exist on a planet. It may not have begun yet, or it may have already died out. This process of elimination seems to leave very few planets on which earthlike life might be found. However, even if life could exist on only one planet in a million, there are so many billions of planets that this would still leave a vast number on which life could exist. Question: Which of the following statements is INCORRECT? - The planet must be as big and heavy as the earth. - Proper conditions are essential to the existence of life. - Double stars can provide steady light and heat. - The distance between a planet and its sun should be right.
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Double stars can provide steady light and heat.

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Read the following article and select the best answer. Article: Oleksander Pylyshenko is either very fearless,very foolish... or both. The 40-year-old zookeeper from the Ukraine recently spent five weeks in a cage with Katya, a 200-kilo African lioness. Why? Well for a start, he wanted to raise awareness of the treatment of animals in captivity. Secondly, he hoped to break the Guinness World Record for time spent living in a cage with a lion. And thirdly? "I wanted to show my children what kind of man I am," said Oleksander. For 36 days, Oleksander and Katya shared the cage together. They ate hunks of meat thrown into the cage by Oleksander's wife, and slept side by side on a bed of hay. Oleksander did have a few more creature comforts than his feline flatmate - he built himself a shower and toilet inside the enclosure. But he didn't use any soap as the sharp scent is upsetting to lions. And as if living with the king of the jungle wasn't dangerous enough, Katya was also pregnant at the time. She gave birth during Oleksander's stay. Wild animals are very protective of their young but the zookeeper said Katya trusted him completely. Oleksander' wife, Olena, was also very trusting. "when he first told me about the plan I was very scared. But I decided to support my husband." Once the five weeks was up, Oleksander stepped out of the cage and declared the experiment a success. He told a Russian news agency, "Katya taught me a lot about honesty and kindness." Also, a representative from Guinness World Records confirmed that Oleksander ahd beaten the previous record by three weeks. But the parting was also bittersweet. "Katya was very sad to see me go," Oleksander noted. Oleksander's wife, on the other hand, was very happy to have her husband back. [(<<>> 20121 "Into the Lion's Den" )] Question: Which is not the purpose of spending 5 weeks in cage with a lion according to Oleksander? [ ] - He wanted to raise awareness of the treatment of animals in cage. - He hoped to break the Guinness World Record for time spent living in a cage with a lion. - He wanted to show his children his kindness as a man. - He wanted to earn money by taking the risk of living with a lion.
(Answer)
He wanted to earn money by taking the risk of living with a lion.

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Read the following article and select the best answer. Article: There are three separate sources of danger in supplying energy by nuclear power. First, the radioactive material must travel from its place of production to the power station. Although the power stations themselves are strongly built, the containers used for the transport of the materials are not. Normally, only two methods of transport are in use, namely road or rail. Unfortunately, both of these may have an effect on the general public, since they are sure to pass near, or even through, heavily populated areas. Second, there is the problem of waste. All nuclear power stations produce wastes that in most cases will remain radioactive for thousands of years. It is impossible to make these wastes non-radioactive, and so they must be stored in one of the inconvenient ways that scientists have invented. For example, they may be buried under the ground, or dropped into deserted mines, or sunk in the sea. However, these methods do not solve the problem, since an earthquake could easily break the containers. Third, there may occur the danger of a leak or an explosion at the power station. As with the other two dangers, this is not very likely, so it does not provide a serious objection (,) to the nuclear program. However, it can happen. Separately, these three types of dangers are not a great cause for worry. Taken together, though, the probability of disaster is extremely high. Question: What is this passage about? - Uses of nuclear power. - Dangers from nuclear power. - Public anger at nuclear power. - Accidents caused by nuclear power.
(Answer)
Dangers from nuclear power.