Q: Write a multi-choice question for the following article, with the given choices and 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... Options: A the star is going to die B special tools are used on it C other stars come close to it D it is seen from the space telescopes Answer: A the star is going to die Question:
A: The gravity of a black hole may become so strong that light cannot get out when _ .

Question: Write a multi-choice question for the following article, with the given choices and answer: Article: We may not be aware of it, but ordinary family homes in the U.S. and the rest of the world are not energy-efficient. Most of their energy goes to heating and cooling, and a lot of it is wasted, as warm air and cool air escape through fireplace chimneys and thin or poorly fitting windows and doors. A passive house loses almost none."Imagine a thermos ,"said housing developer Brendan O'Neill."You have insulation everywhere, and it's basically completely sealed. And so the idea is to build a house like a thermos. So the windows are sealed. There's insulation completely surrounding the building. We make it as sealed as possible." A 147-square-meter passive house, presented by O'Neill Development Corp. as a demonstration unit just outside Washington, was brought to the site in two boxes."Once it's set and put together, it takes about four weeks to complete the outside construction, to put down carpets,"O'Neill said."If everything is set in place, you put a house like this together in about four months."The total cost of building it was $325,000, or about 17 percent more than constructing an ordinary house. But its utility bill is only around $20 monthly, or one-tenth the amount for the average house of the same size. While passive houses have been around for a long time, the idea has never taken root in the U.S. There was no driving force to push it. However, David Peabody, an architect who designs passive houses said,"I think climate change is now becoming a larger issue. And I think building standards are catching on to that. So people are becoming more aware of energy."Peabody said the cost of building passive houses could come down."What really makes sense for truly affordable housing,"he said,"is to build multi-storey buildings." Options: A They enjoy little popularity. B Multi-storey ones are common. C Building passive houses is impractical. D Their advantages are still unclear. Answer: A They enjoy little popularity. Question:
Answer: How are passive houses in the U.S. now?

Question: Write a multi-choice question for the following article, with the given choices and answer: Article: You are invited to join PTPI (People to People International)'s President and CEO, Mary Jean Eisenhower, inprefix = st1 /America's Capitol for the2009 Global Youth Conference! In D.C., you will spend four exciting days exploring into this year's theme, "Global Sustainability: It's All Connected!" Come to the GYC to learn how you can work together with friends from around the world to create a better, brighter and greener future! 250 students will stay in the Hyatt Crystal City Hotel in Arlington,Virginiafrom November 11-15, 2009 for this eye-opening conference. We hope that you will join us in exploring PTPI's mission through international understanding, education, leadership and humanitarianism! Highlights of this event will include: * A key-note address presented by PTPI's President and CEO, Mary Jean Eisenhower! * An interactive student group, featuring your peers from across the globe! * Take an active part in sustainingWashington,D.C.through a service project benefiting the Anacostia Watershed! * A unique tour of Washington,D.C.-- we promise that you have never seen D.C. this way before! * An opportunity to reunite with old friends and make new ones from around the World! Application Successful applicants aged 13-18 who will be enrolled in a middle school, high school or home school during the time of the conference will be accepted _ . We urge students to APPLY ON-LINE TODAY, as applications will likely exceed available space. Upon acceptance into the Global Youth Conference, you will receive a confirmation notice and other important information via e-mail. If you have any questions regarding the application process, please contact People to People International: youthconference@ptpi.org Options: A A third grader in a primary school. B A 19-year-old student at college. C A student who receives a confirmation notice. D A student who sends the application on Nov. 17. Answer: C A student who receives a confirmation notice. Question:
Answer:
Which of the following students is most likely to be able to attend the GYC?