In this task, you're given an article and an answer. Your task is to generate the fill-in-the-blank question for this answer based on the given article. The blanks are always at the end of the question, and can be filled with more than one word or phrase.

Article: Sleep is like food for the brain. Enough sleep helps the body and the brain grow and develop. However,many Chinese do not sleep well,and many do not pay enough attention to sleep. The Chinese Medical Doctor Association released the 2013 China Sleep Quality Index on March 19 to mark World Sleep Day---March 21. According to the index,nearly a quarter of Chinese people don't sleep well.Half said that they feel tired after getting up and 15 percent people have trouble falling asleep. Ye Jingying,a sleep expert at Beijing Tongren hospital,says:"If people often wake up during the night,or always feel weak and tired in the day,they should pay attention to their sleep pattern." Many people play with their cell phones or i pads before sleeping.The report said that this is one of the main reasons for bad sleep.Other reasons include stress and bad moods. How to sleep well? Above all,get enough sleep.Seven to nine hours of sleep every night is perfect for an adult,and eight to nine hours is best for a teenager. Forming good sleep habits is important.The report suggested that people need to keep away from digital devices for at least an hour before sleep. The lights keep their brains excited for a long while.Other suggestions include:try to go to sleep and wake up at the same time every day,even on weekends and during holidays,and do the same relaxing things before bed each night,like listening to soft music.
Answer: March 21
According to the passage,World Sleep Day falls on _ .

Article: His first fight was for the equal rights of black people in South Africa. Then, as the first black president he fought to unite the country and organize the government. Now Nelson Mandela has set his sights on a new enemy, AIDS. On March 19 the 82-year-old, former president, hosted his second AIDS-awareness concert. He warned that 25 million people in Africa were already infected with the fatal disease. Mandela was born in a small village in South Africa in 1918. He was adopted by the chief of his tribe and could have been a chief himself and lived a happy country life. But he refused to be a chief when his people lived under racial discrimination ( ). He decided to fight for equal rights for all the people in South Africa. Before 1990, under the country's Racial Segregation Law , colored and white people lived separately. Black people were treated unfairly even when taking a bus. Blacks had to stand at the back of the bus to make room for white people even when there were only a few of them on board. For his opposition to the system Mandela was arrested and spent 27 years in prison. He was freed in 1990 and become the president of the country after the first elections were held in which everyone could vote. Mandela was not only a political fighter who attacked with speeches. He was also a trained boxer and fought in the ring when he was young. " Although I did not enjoy the violence of boxing, I was interested in how one moved one's body to protect oneself, how one used a strategy both to attack and retreat ," he wrote in his autobiography. As a skilful fighter, he chose music as his weapon against AIDS. He hopes to win another victory against AIDS.
Answer: controlling the spread of AIDS
Nelson Mandela succeeded in doing the following except _ .

Article: Children love to play and laugh throughout their days at school or at home. Finding the time to laugh with your children may be the best thing you can do for the relationship. Encourage your children to develop a good humor by laughing at the jokes they make up on the spot. This will help them grow confident and build their self-esteem. If you do not get the joke, you can ask why they think the joke is funny. Honest feedback will help your children develop funnier jokes. You can take them to your local library and have them pick up a few joke books. Then you can head back home or out to the park and read it together for a good laugh. You can take turns reading jokes to each other from the book or make up a few yourselves. But if they make a joke at the expense of another person, you may want to discuss the difference between making fun of yourself and making fun of others. In turn try not to make jokes at your children's expense, you need to set an example that they can follow. Learning to laugh at oneself is a great quality to attain. You can set an example by laughing at your own mistakes. This is a great way to help reduce your own stress as well as your children's. Laughing may make the situation seem lighter and easier to work through. By doing this your children will be better prepared to handle any difficulties. Most importantly laughing will bring you closer together as a family. You can have your family find different ways to laugh. You can play games. You can start a staring contest, arm wrestling contest, thumb wars contest and have a prize for the winners. You can all watch your best funny movies and act out the best parts together after enjoying them. You could hold a contest to see who can make the other members of the family laugh more by doing something funny. Kids will be able to enjoy the good time they had with their parents. The family that laughs together stays together!
Answer: get along well with each other
If you often play and laugh with your children, you can _ .