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Read the article and select the best answer. Article: For thousands of years comets have been a mystery to man. They travel across the sky very fast and have a bright "tail" of burning gas. The comet Tempel 1 has an orbit far outside the orbit of the furthest planet in our solar system, Pluto. It has been there for 4.6 billion years, 133 million kilometers from Earth. Last week a little American spacecraft crashed into Tempel 1. The spacecraft had a camera and it took a photograph of the comet every minute before it finally crashed into its surface. The space mission to Tempel 1 cost $335 million and was called Deep Impact. The spacecraft was travelling at 37,000 kilometers per hour when it hit the comet and the crash completely destroyed the spacecraft. But before it hit the comet, the spacecraft took some amazing photographs. The last one was a close-up picture which the spacecraft took just 3 seconds before it crashed into the comet. "Right now we have lost one spacecraft," said a delighted NASA engineer. Deep Impact was like a American Independence Day fireworks display. It took many years to plan and ended in an enormous explosion. The spacecraft which crashed into the comet was made of copper and was the size of a washing machine. It was dropped from a mothership into the path of the comet and the mothership then photographed the cloud of ice, dust and organic chemicals that rose from the surface of the comet after the crash. The crash completely destroyed the spacecraft but nothing really happened to the comet: experts believe that the crash slowed the comet down by no more than 1/10,000 of a millimeter a second.The aim of the mission was to study for the first time the _ of a comet.[:..] The mothership was 480 km from the explosion and observed the crash and the explosion with instruments for 800 seconds. Seven satellites, including the Hubble space telescope, watched the moment of drama, and over the next day and night about 50 telescopes on Earth were watching the distant comet. Question: How many hours did it take for the spacecraft from the earth to touch the comet Tempel 1? Options: A: About 2,500 B: About 3,500 C: About 4,500 D: About 5,500
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B

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Read the article and select the best answer. Article: So far, scientists have named about 1.8 million living species ,and that's just a small part of what probably exists on Earth.With so many plants,animals,fungi,and other organisms covering the planet,it can be tough to figure out what type of spider is crawling up your leg or what kind of bird just flew by. A soon-to-be-launched Website might help.An international team of researchers has announced the creation of a Web -- based Encyclopedia of Life (EOL).The project aims to catalogue every species on Earth in a single,easy-to-use reference guide. To get the encyclopedia started,the creators will use information from scientific databases that already exist.And eventually,in special sections of the site,nonscientists with specialized knowledge will join.Gardeners,for example,will be able to record the dates that their flowers first bloom each year.Bird-watchers will be able to input which birds they've seen and where.The technology for this kind of tool has only recently become available. As the EOL develops, you might find it useful for school projects.The site will have special pages for kids who are studying ecosystems in their neighborhoods.To make sure the encyclopedia is accurate,scientists will review much of the information added to it.People who visit the site will be able to choose to skip pages that haven't been reviewed. Another convenient characteristic of the EOL is that you'11 be able to pick the level of detail you see to match your interests,age,and current knowledge. If you wanted to learn about polar bears for a science class report,for example,you could use the _ setting to get basic information about the animals.On the "expert" setting,on the other hand.you could get much more detailed information about the history,literature,and exploration of polar bears. It now takes years for scientists to collect all the data they need to describe and analyze species.The creators of the Encyclopedia of Life hope that their new tool will speed that process. Keep an eye on _ .Pages will begin to... Question: What is the best title for the passage? Options: A: Exploring Polar Bears. B: Visit Our Website Now. C: How to Do School Projects. D: E-book of Life.
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D

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Read the article and select the best answer. Article: Many crimes and social problems are caused by children. Despite the damage these teenage criminals cause, parents are not responsible in most countries. This article will discuss whether parents should be forced to pay for their children's crimes. There are many reasons why parents should not be responsible for crimes committed by teenage children. First of all, teenagers today are independent. They often move out of the parents' house at 18 years of age or younger. They are expected to learn to take care of themselves and make their own decisions, and not to stay like small children attached to their parents. Secondly, parents are working. They cannot watch their adolescent children all the time. A third point is that even children from good families can sometimes commit crimes. Parents should not be responsible if they have worked hard to raise their children properly. However, young troublemakers cause many problems, and I feel we should make parents responsible. Firstly, most juvenile crimes are committed by adolescents whose parents do not care or make any effort to control their children. If parents had to pay fines , they might make more effort. Another point is that even though the children may seem mature, they are not really able to make good decisions. Parents should be responsible for raising and teaching their children until they are fully grown. Furthermore, if children know that their parents will have to pay, they will think carefully before getting into trouble. In summary, there are good reasons both for and against making parents pay for acts committed by their children. However, I feel strongly that if we want to reduce the number of such crimes, we need to make parents take more responsibility. Question: What can be the best title for the passage? Options: A: Proper ways to educate children B: Reasons for children's crimes C: Should children move out? D: Should parents pay?
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D