input question: 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:???
output answer: The ball is easier to hold on to _

input question: Write a multi-choice question for the following article, with the given choices and answer: Article: Bringing a giraffe into the world is _ . A baby giraffe is born 10 feet high and usually lands on its back. Within seconds it rolls over its legs under its body. Then the mother giraffe rudely introduces its children to the reality of life. In his book,A View from the Zoo, Gary Richmond describes how a new-born giraffe learns its first lesson. The mother giraffe lowers her head long enough to take a quick look. Then she puts herself directly over her child. She waits for about a minute, and then she does the most unreasonable thing. She throws her long leg and kicks her baby, so that it's sent sprawling . When it doesn't get up, the process is repeated again and again. The struggle to rise is important. As the baby giraffe grows tired, the mother kicks it again. Finally, it stands for the first time on its shaky legs. Then the mother giraffe kicks it off its feet again. Why? She wants it to remember how it got up. In the wild, a baby giraffe must be able to get up as quickly as possible to stay with its group, where there's safety. Another writer named Irving Stone understood this. He spent a lifetime studying greatness, writing stories about such men as Michelangelo, Vincent van Gogh, Sigmund Freud, and Charles Darwin. Stone was once asked if he had found something that runs through the lives of all these great people. He said, "I write about people who sometime in their life have a dream of something. They're beaten over the head, knocked down and for years they get nowhere. But every time they stand up again. And at the end of their lives they've realized some small parts of what they set out to do ." Options: A A new-born giraffe's first lesson. B A mother giraffe's story. C The lives of some great people. D The way for a giraffe to stand up. Answer: A A new-born giraffe's first lesson. Question:???
output answer: What does the bookA View from the Zootalk about?

input question: Write a multi-choice question for the following article, with the given choices and answer: Article: Jane is a school girl. She is twelve. She studies at a middle school. She is in Grade Seven. She is a good girl. Jane gets up at seven in the morning. Then she has her breakfast. For breakfast she has eggs and a cup of milk. She doesn't have tea for breakfast. After breakfast Jane goes to school. At twelve she comes home from school. She has lunch with her mother. For lunch she has hamburgers and salad. She likes salad, but she doesn't like hamburgers. At seven she has supper with her father and mother. They have chicken and vegetables. Her father likes chicken, but Jane doesn't. Options: A primary school B middle school C university D college Answer: B middle school Question:???
output answer: Jane is a school girl in a _ .

input question: Write a multi-choice question for the following article, with the given choices and answer: Article: You're going to high school, aren't you? Maybe you don't know what to do. Well, here's a list of the top six things to do when you're in high school. These things will give you ideas of what your high school life could be like. Here you go! Find your passion and what kind of person you are: Whether it's dance, basketball, or drawing, the important thing is that you have found something you are interested in. Talk to people you wouldn't usually talk to: Meet new people, find new friends and even talk to the people you don't like. It will show what a great person you are. You never know what will happen after high school. Take part in at least one contest: This will give you tears of laughter, happiness and memories. Get a job: This will help you see what it's like to have responsibility .It can also help you make a little money to spend on yourself. Take a trip with your friends: It doesn't matter where you go or what you do, the memories will happen on the way and go on till the final place. Do your best at school: Don't ever get lazy. Working hard now will help you in the future. Options: A Have a happy school life. B How to get along with your schoolmates. C Ideas of successful high school life. D Make your school life easy. Answer: C Ideas of successful high school life. Question:???
output answer:
What's the main idea of the passage?