Question: Write a multi-choice question for the following article, with the given choices and answer: Article: The speed of light is often called a"constant ". New experiments show that may not be true, even within a vacuum. Sometimes, light slows a bit. The new research is"very impressive work", Robert Boyd toldScienceNews.An optical physicist at the University of Rochester in New York, he did not work on the study. He speaks of the new finding:"It's the sort of thing that's so obvious; you wonder why you didn't think of it first." Light travels as particles and as waves. Photons are the name given to those particles that represent the smallest possible amount of light. At their fastest, photons travel nearly 300 million meters (almost 1 billion feet) in a single second. That's fast enough to get to the moon and back in about 2.6 seconds. Scientists had long known, though, that they could slow light photons down by shining them through a material such as glass or water. Still, light moving through a vacuum has usually been assumed to move at a peak speed. That would seem to make sense. After all, a vacuum is a space with nothing in it to slow light down. In a new study, however, scientists show that even racing through a vacuum, light can slow. So the speed of light is more of a universal speed limit than an rule for how fast photons travel, the new data suggest. Miles Padgett led the new study. As an optical physicist, he works at the University of Glasgow in Scotland. He and his colleagues showed that the key to slowing light is to change the shape of a light wave. Padgett described how they did this in a paper published online January 22 inScience. His team raced a pair of photons. One traveled unchanged through a cable made from optical fibers. The other passed through a pair of devices that acted like lenses. A lens changes light: It can focus a spread-out beam of light on a point, for instance. The second photon passed through one device that changed the shape of its waveand another that changed it back to its original form. The first photon won the race. The second photon came in a tiny bit later, several... Options: A light travels slowest through a lens B light can be slowed down in a vacuum C why the shape of a light wave can be changed D what optical research looks like currently Answer: B light can be slowed down in a vacuum Question:
Answer: The passage mainly tells .

[Q]: Write a multi-choice question for the following article, with the given choices and answer: Article: Each year,millions of people go abroad to work,study,or travel.It's a great way to find out what life is like in another part of the world! You're probably hoping to make new friends and learn about the culture in your host country everything from attitudes and beliefs to social customs and popular foods.But constantly having to deal with new situations can be frustrating ,even stressful. Homesickness,stress,fear,and confusion are all symptoms of"culture shock".At first,you may feel like getting on the plane and heading home.It's OK to have those feelings,but the following are some tips to help you handle the challenges that you will face. Don't expect to be perfect.You may feel frustrated that you have culture shock,especially since you probably spent so much time preparing for your trip.No matter how much information you read,or how well you speak the host language,it is natural to feel over-whelmed sometimes.If you give yourself some time,things will gradually get easier. Have an open mind.While it's certainly OK to feel frustration or confusion in your new surroundings,try not to form an opinion about the new culture too soon.Don't think of the host as better or worse,just different--you'll be more willing to try new things. Participate.This is obvious,but everybody needs to be reminded.Just watching life go on around you isn't good enough.You really need to try things for yourself.Don't worry about making a mistake;people in your host country will generally be very understanding and willing to help if you have question.Your study abroad experience is fl unique and special time in your life,one that you'll never forget.If you follow our suggestions,you'll be able to handle it well,and have a wonderful time.Good luck ! Options: A How to overcome culture shock. B Why do people have culture shock. C Who might have culture shock. D When will you have culture shock. Answer: A How to overcome culture shock. Question:
****
[A]: What is the main idea of this article?

input: Please answer the following: Write a multi-choice question for the following article, with the given choices and answer: Article: High heels, coffee cups and dogs have been regarded as three of the most dangerous things to have in a car. The seemingly harmless items have been responsible for more than 13 million crashes and near misses on Britain's roads. While men were responsible for the greater number of accidents reported, women played their part by driving in high heels. Putting fashion over function meant 44 percent of female motorists had been prevented from using the pedals correctly by their high heels--with those aged 25 to 34 accounting for most of the incidents reported. Those keen for a caffeine kick while driving can also create an accident if they leave empty coffee cups lying around their vehicle. Twenty percent of those surveyed admitted they had crashed their car or had a near miss after a deserted coffee cup or empty drink bottle rolled under their brake pedal . However, it is not just wearing and eating that cause a threat from inside the car, man's best friend could also cause a catastrophe if not safely secured. One in eight motorists claimed to have had a scrape or near miss on the road due to their dog's wandering freely, climbing into the front seat or trying to escape through the windows. The accidents meant drivers took their eyes off the road for more than three seconds each time, according to the poll of 2,000 British motorists. The survey has found drivers will pick up an average bill of PS261.47 for the damage caused by every crash. Londoners were the most at risk of an accident closely followed by motorists in the West Midland and Wales. Janet Connor, a managing director, said many accidents could be avoided if people cleaned their cars regularly, as one in ten drivers involved in crashes admitted to driving inside a mountain of debris. She said, "The possible dangers and distractions outside the car are well known but as the evidence suggests, those within the car are often forgotten." Options: A the coffee may make them feel faint B the coffee may make the car smell terrible C the deserted coffee cups may make the brake fail D the deserted coffee cups may look the same as brake pedals Answer: C the deserted coffee cups may make the brake fail Question:
++++++++++
output:
Those who like drinking coffee often have accidents because _ .