Article: Studies show farmland in Africa is often lacking in important nutrients. But researchers say combining different farming methods may help. Since the world food crisis several years ago, researchers have directed more of their attention to small farms. Most farms in areas south of the Sahara Desert are only about one or two hectares. One of the goals is to increase production without necessarily clearing more land to grow additional crops. American researchers say that can happen with greater use of an agricultural system called perennation. It mixes food crops with trees and perennial plants - those that return year after year. Mr. Reganold, who is with Washington State University, says poor soil may have resulted from years of weathering that washed away many nutrients. He says some farmers may have done more harm than good. He estimates that up to two billion dollars worth of nitrogen, phosphorous and potassium is lost from African soil each year. The scientist says the word perennation defines three systems that are already used in Africa. The oldest of the three is called evergreen agriculture. This is where farmers plant trees with their crops. John Reganold says farmers in Africa have been doing this for sixty years, but it seems to be growing in popularity. The method is gaining widespread use in countries such as Niger, Burkina Faso, Malawi and Zambia. The trees are planted among maize, millet or sorghum crops. They not only add nitrogen to the soil through their roots, but also through their leaves when they fall off and break down. At other times of the year, the trees can protect plants from strong sunlight. Mr. Reganold was one of three researchers who wrote a report about perennation. It was published in the journal Nature. Question: The word"perennation"mentioned in this passage _ . Yes or no, is the answer "is a farming method of planting food crops with trees"?
Yes

Article: The year is 2094,It has been announced that a comet is heading towards the Earth.Most of it will miss our planet, but two pieces will probably hit the southern half of the Earth. On 17 July, a piece four kilometers wide enters the Earth's atmosphere with a massive explosion.About half of the piece is destoryed but the remaining part hits the South Atlantic at 200times the speed of sound.The sea boils and a huge gole is made in the sea bed.Huge waves are created and spread outwards form the hole.The eall of water,a kilometer high,rushes towards southern Africa at 800 kilometers an hour.Cities on the African coast are totally destroyed and millions of people are drowned. Before the waves reach South America.the second piece of the comet lands in Argentina.Earthquakes and volcanoes are set off in the Andes Moutains.The shock waves move north into California and all around the Pacific Ocean. The cities of Los Angeles,San Francisco and Tokyo are completely destroyed by earthquakes,Millions of people in the southern half of the earth are already dead,but the north won't eacape for long.Because of the explosions the sun is hidden by clouds of dust,and temperatures around the world fall to almost zero.Crops are ruined.The sun won't be seen again for many years.Wars break out as countries fight for food.A year later,no more than 10 million remain laive. Could it really happen?In fact,it has already happened more than once in the history of the Earth.The dinesaurs were on the Earth for over 160 million years,Then 65 million years ago they suddenly disappeared.Many scientists believe that the Earth was hit by a piece of object in space. The dinosaurs couldn't live through the cold climate that followed and they died out .Will we meet the same end ? Question: Why can't the northern half of the earth escape ofr long? Yes or no, is the answer "Because the light and heat from the sun can not reach the earth."?
No

Q: Article: A young man named Matt Vongsykeo, 14-year-old, has saved a baby from the wreckage of a car. The four-month-old baby boy, found hanging in his capsule when Vongsykeo climbed into the car in Melbourne's Springvale, escaped serious injury and was taken to hospital. But the child's 33-year-old mother, from Endeavour Hills, died in hospital following last night's high speed crash, which left three other people injured. A car on the wrong side of the road is thought to have been traveling at over 100 kph when it hit three other vehicles. Vongsykeo said he heard the crash from his house and found a _ rushed against a wall. He heard a baby crying. "There were two adults standing outside the car and they couldn't get in, so I had to climbed in and get the baby out," he said. "I had to do it quickly because there was a window below me and I was afraid that was going to break." Vongsykeo told how he took out the baby in his arms and called to see if there was anyone else in the car. He found the baby's mother unconscious . "I thought she was dead so I just rushed out." he said. "She entered consciousness later on and I went around and started talking to her and getting her to talk to me and stay with me." He said he comforted the mother and told her baby was safe. Vongsykeo refused the idea that he was a hero. "I've lived for 14 years. If something had happened to me ... I've lived for 14 years. That baby hasn't and I wanted to give him a chance." Question: What would be the best title for the passage? Yes or no, is the answer "A young man saved a baby after car crash"?
A: No

(Question)
Article: Scott Langteau has this message for kids:spend less time playing video games. It's a message that many a mom and dad have tried to impress upon many a youngster (and some notsoyoungsters) who spend perhaps a bit too much time with game controllers in hand. But the 40yearold Langteau isn't a parent.He's a veteran of the video game industry--one who played producer on three "Medal of Honor" games and cofounded his own game development company. Langteau has just published a children's books called Sofa Boy,which tells the story of a kid who spends too much time sitting on the couch with controller clutched in hand and the rather terrible consequences that follow. It's a fairy tale plucked straight from Langteau's own experiences as a lad with a fondness for video games and his own bouts with a bit of game addiction.But first,Langteau would like to make one thing clear,"I'm not saying that you shouldn't play video games.I think video games are great.I think they do great things for kids."Instead,Langteau says his book is all about a little something called moderation . "It's about being well rounded," he says."Just like with anything else,we all need to make sure that there's a variety in what we do." Video gamers can be rather badtempered when it comes to accepting criticism about their favorite entertainment.And understandably so.After all,most people who go around talking about the dangers of playing video games tend to be outsiders--people who don't play video games and certainly don't understand that they can be a valuable and healthy form of entertainment. But Langteau and Sofa Boy seem to be in a unique position to deliver a message of gaming moderation that the young game masses might actually listen to.After all,this is a man who understands what it means to be a kid with a passion for games.His early experience has taught him a lesson. Question: By saying "It's about being well rounded,..." (in Para.6),Langteau means _ . Yes or no, is the answer "games should be viewed from all sides"?
(Answer)
Yes