[Q]: Write a multi-choice question for the following article, with the given choices and answer: Article: We know more about the surface of the planet Mars than we know about what is at the bottom of Earth's oceans. Until recently, scientists had mapped only about 20 percent of the sea floor. But our knowledge of the deep seas is changing because of information from satellites. Scientists have produced a new map that provides a detailed picture of the oceans. The map is expected to help oceanographers, industry and governments. The new map is twice as detailed as the map made 20 years ago. David Sandwell is a geophysics professor at the Scripps Institution of Oceanography at the University of California. He and other scientists worked on the mapping project. He says they turned to space to look deeper into the ocean. He spoke to VOA on SKYPE. "The way we're doing that is to use a satellite altimeter , a radar to map the topography of the ocean surface. Now that seems sort of strange that you'd map the topography of the ocean surface when you really want to get at the sea floor. But, the ocean surface topography has these bumps and dips due to gravitational effects that mimic what's on the sea floor." The scientists collected and studied information from two satellites. Some of the data came from the European Space Agency's Cryo-2 satellite. It was placed in Earth's orbit to watch sea ice. The other satellite is the American space agency's Jason-1. It is studying the surface of the oceans. Scientists combined the satellite data with images gathered by sonar equipment on ships. Sonar works by sending sound waves through the water. When the sound waves hit an object, its presence is confirmed. "That enables us to look at smaller-scale features and also features that are buried by sediments in the ocean basins." The new map shows the sea floor as it has never been seen before. It shows thousands of underwater mountains and places where continents pulled apart. It shows where earthquakes were active many years ago. They all are buried deep underneath the ocean floor. In one place, three mountain ridges join at the... Options: A the European Space Agency's Cryo-2 satellite B the American space agency's Jason-1 C sonar equipment on ships D the Cryo-2 and the Jason-1 Answer: D the Cryo-2 and the Jason-1 Question:
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[A]: Scientists collected and studied information by _ .

input: Please answer the following: Write a multi-choice question for the following article, with the given choices and answer: Article: John "Mad Jack" Mytton (1796--1834) was a carefree English aristocrat who was born into immense wealth. However, he died a poor man after a life that was once described as " _ ". So, what went wrong? As a young boy, Jack went to Westminster School, but after only one year he was expelled for fighting with a teacher. He was then sent to Harrow School but only lasted three days before he was also thrown out. He was eventually educated by private tutors. After school, Jack went to Cambridge University. He arrived with 2,000 bottles of port, but left without graduating - he found university life boring. Later, he joined the army, enlisting with the 7th Hussars. As a young officer, he spent a year with the regiment in France as part of the occupation force after Napoleon's defeat in 1815. Jack passed the time gambling and drinking before resigning his commission. At the age of 21, he returned to his country house just in time to receive his inheritance. With an annual income of over PS800,000 in today's money, Jack was extremely rich... but it didn't take him long to spend it all. In 1819, he became an MP. In order to secure his seat, he offered voters PS10 notes to vote for him, spending more than PS10,000 in total. However, he found politics dull and went to parliament only once. Back at home, he would often drop bank notes in the gardens of his estate, and gave his servants vast amounts of spending money. Once he lost his racetrack winnings (several thousand pounds) when the wind blew all the money away. One of Jack's favorite pastimes was hunting. He would go in any kind of weather, occasionally with no clothes on. Sometimes, he would get up in the middle of the night, take off with a gun to look for something to shoot. Jack also kept a large number of pets. These included about 2,000 dogs. Some were fed on steak and Champagne and even wore livery. A favorite horse had free range inside Halston Hall and would often lie with Jack in front of the fire. Jack was a bit of a practical joker, too. He once left a... Options: A Jack was first educated by private tutors and eventually graduated from Cambridge University. B Jack joined the army and succeeded in defeating Napoleon's army in 1815. C Jack bribed the voters in order to gain a position of MP. D Jack fed his favorite horse with meat and wine and often lay with it in front of the fire. Answer: C Jack bribed the voters in order to gain a position of MP. Question:
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output: It can be inferred in the passage that _ .[ ]

Problem: Write a multi-choice question for the following article, with the given choices and answer: Article: Backpacks are convenient. They can hold your books, your lunch, and a change of clothes, leaving your hands free to do other things. Someday, if you don't mind carrying a heavy load, your backpacks might also power your MP3 player, keep your cell phone running, and maybe even light your way home. Lawrence C. Rome and his colleagues from the University of Pennsylvania in Philadelphia2 and the Marine Biological Laboratory in Woods Hole3, Mass. 4, have invented a backpack that makes electricity from energy produced while its wearer walks. In military actions, search-and- rescue operations, and scientific field studies, people rely increasingly on cell phones, global positioning system (GPS)5 receivers, night-vision goggles, and other battery-powered devices to get around and do their work. The backpack's electricity-generating feature could dramatically reduce the amount of a wearer's load now devoted to spare batteries, report Rome and his colleagues in the Sept. 9 Science6. The backpack's electricity-creating powers depend on springs used to hang a cloth pack from its metal frame. The frame sits against the wearer's back, and the whole pack moves up and down as the person walks. A gear mechanism converts vertical movements of the pack to rotary motions of an electrical generator, producing up to 7.4 watts. Unexpectedly, tests showed that wearers of the new backpack alter their gaits in response to the pack's oscillations, so that they carry loads more comfortably and with less effort than they do ordinary backpacks. Because of that surprising advantage, Rome plans to commercialize both electric and non-electric versions of the backpack. The backpack could be especially useful for soldiers, scientists, mountaineers, and emergency workers who typically carry heavy backpacks. For the rest of us, power- generating backpacks could make it possible to walk, play video games, watch TV,and listen to music, all at the same time. Electricity-generating packs aren't on the market yet, but if you do get one eventually,... Options: A your hands are freed to do other things. B they can hold as many things as you want to carry. C they can be very large. D you do not have to carry things with you. Answer: A your hands are freed to do other things. Question:

A:
Backpacks are convenient because