input: Please answer the following: Write a multi-choice question for the following article, with the given choices and answer: Article: In fall 2006,the National Basketball Association (NBA)started using basketballs made with synthetic ,or man-made ,material instead of leather .They made the change be- cause they wanted every basketball they use to feel and bounce the same.Not all leather balls are exactly alike in weight or how they bounce,but the synthetic balls are. However,some players complained right away that the new balls bounced differently and were actually harder to control than the leather ones. Physics helped answer questions about why the new balls felt different.For example,the scientists studied friction ,which in this case affects the ability of a player to hold onto a ball."The greater the friction,the better it will stick to his hand,"explains a scientist. Tests on both wet and dry balls showed that while the synthetic ball was easier to hold onto when dry,it had less friction and became much harder to hold onto when wet.That's because _ stays on the surface of the synthetic balls but gets taken into the leather balls. The scientists also tested bounce and found that the logo printed on the new balls made their surface uneven and caused them to bounce a little strangely com- pared with the leather balls. In January,the NBA went back to using the leather balls.They aren't perfect,but for now,that's just the way the ball bounces. Options: A when friction is greater B when friction is less C when it is heavier D when it bounces strangely Answer: A when friction is greater Question:
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output: The ball is easier to hold on to _

input: Please answer the following: Write a multi-choice question for the following article, with the given choices and answer: Article: Many people hurt their backs when they try to lift heavy things from the floor. It is easy to hurt your back muscle when you try to pick up a heavy thing. However, there is a correct way to lift things from the floor. If you pick up heavy things correctly, you probably will not hurt your back. To lift something from the floor correctly, first bend your knees and lower yourself. Keep your back straight. Do not bent over, from your waist keep your back and hips and waist in a line. If you bent over, the muscles in your lower back can became hurt very easily. If you keep your back and hips straight, the muscles are stronger, because they hold up together. The other muscles can then help the lower back muscles. As you lower yourself, try to get as close to thing as you can, put one knee on each side of the thing. Remember at all times to keep your back straight. Put your hand under the thing that is in front of you, between y our knees. To lift the thing, you should stand up slowly. Use your leg muscles in order to stand up. lift with your legs, not with your back. Options: A stand up slowly B keep your back straight C bend your knees D put one knee on each side Answer: B keep your back straight Question:
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output: To lift heavy things, the most important of all is to _ .

input: Please answer the following: Write a multi-choice question for the following article, with the given choices and answer: Article: Enjoying a better life at school, with shorter class hours, greater privacy and more rights is all you dream of, right? For students in Shanghai, they are no longer just dreams. This week experts and law-makers in Shanghai had a meeting to talk about a new law . It is called the "Shanghai Underage Protection Law ". The law says students' diaries and letters are their secrets and "Nobody can read them if they don't agree." Do your teachers sometimes say something bad to you? Maybe they send you out of the classroom because you fail to finish doing your homework. If this happens in Shanghai, you can stand up and say "No". Shanghai students may have less homework because of the law. Class hours may become shorter for juniors next year, down from 45 minutes to 40 minutes in some schools. The law also talks about students' health. According to the rules,"Smoking in these places full of kids is not allowed."That means you can ask your teacher to stop if he smokes in a classroom. The law makes schools safer for students. "No dancing halls, Internet bars or computer game bars are allowed within(......)200 meters of a school gate." the law says. The law is great, right? Many students like it. "My mom reads my diaries sometimes. I think she will be afraid if I tell her she is doing something against the law." said Luo Jia, 13, at Shanghai Fuxing Junior School. If you want to know more about the law, go to "www.spcsc.sh.cn". ,. Options: A good B wrong C not useful D impossible Answer: A good Question:
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output: According to the passage, we know the new law is _ for the students.

input: Please answer the following: Write a multi-choice question for the following article, with the given choices and answer: Article: Nobody likes to do chores, especially kids. How can you make your kids get into a good habit of doing their chores? Try making chores fun for them. Play some music:Music makes everything seem like a party, doesn't it? Play your kids' favorite music and let them dance around while they are doing their chores. Make it a treasure hunt : It's a good way when you would like them to clean the house. Let them know that you hide a $5 bill someplace. If they find it, they can keep it. Change often:If your kids keep doing the same chores for months, they may feel bored. Teaching them a new task is fun for both you and the kids. They will feel more grown up when they get a new task. Do it together:It's never fun to be the only one working and watching everyone else relaxing. If everyone takes part in doing chores, you will finish them faster and have more fun. ,. Options: A schools B teachers C parents D kids Answer: C parents Question:
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output:
The article is for _ .