There is an English saying that goes,“he who laughs last laughs the hardest.”High School Musical star Zac Efron is laughing a lot these days.

    {#blank#}1{#/blank#} Because he was always the smallest in his class and was laughed at because he had a big space between his teeth. In sixth grade, Efron's basketball team made it to be the league championships. In double overtime(两个加时赛),with three seconds left, he rebounded the ball and passed it to the wrong team! {#blank#}2{#/blank#}.

    {#blank#}3{#/blank#} Now at 21,Efron is one of People Magazine's 100 Most Beautiful People, graces(荣登)the cover of Entertainment Weekly Hollywood's most influential magazine, and is travelling the world promoting the third High School Musical film. Director Adam Shankman described Efron as “arguably the biggest teen star in America right now” Simply google “Zac Efron”, and you get more than 14 million responses. Yes, it seems Efron has a lot to smile about these days.

    Efron was born and raised in California. {#blank#}4{#/blank#} According to Efron,“he would flip out(发疯) if he got a B and not an A in school, and that he was a class clown.”It was his father who encouraged him to act. {#blank#}5{#/blank#} He also took singing lessons. He graduated from high school in 2006 and was accepted at the University of Southern California to study film. But he put it off —why study movies when you can star in them. Efron has risen all the way to the top of the movie business. And he can now laugh all the way to the bank.

A. He owed it a lot to his father that he succeeded.

B. But history, as they say, is a thing of the past.

C. He took part in school performances and acted in a local theater.

D. When he was young, Efron was an unqualified basketball player.

E. He took school seriously.

F. They scored and his team lost the game.

G.As a young boy, Efron was picked on by his classmates.

    Early birds-people who feel most energetic in the morning-tend to make healthier food choices throughout the day than night owls(夜猫子) , according to a new study.

    "Evening types had more irregular meal times," notes study author Mirkka Maukonen, studying human nutrition and obesity(肥胖) in Finland.

    Her study focused on people's risk of heart disease and their eating habits. Participants described when and what they had eaten during the past two days.

Maukonen's team then looked at l,854 people's lifestyle. After analyzing the data, the researchers found that both morning and evening people consumed approximately the same number of calories over a whole day.  However, night owls tended to eat their meals later than early birds. Before 10:00 am, night owls consumed less food than early birds. More of their calories came from sugar. After 8:00 pm, the night owls ate more sugar and fat. Meanwhile ,early birds ate more protein during both the morning and the evening hours.

    "Night owls tend to be less healthy than early risers," notes Courtney Peterson who studies diet and meal timing. "They are more likely to get heart disease or cancer. The fact that night owls tend to eat more junk food probably plays a role," Peterson says. "Other factors(因素) also can ruin a night owl's health. Night owls generally sleep worse," says Peterson. "Poor sleep has been linked to unhealthy food choices. "

    Peterson and Maukonen say night owls tend to have poor eating habits. But that doesn't necessarily mean that being a night owl makes a person a poor eater. It could be the reverse- eating poorly could affect people's sleep habits.

"The new findings should serve as a wake-up call to night owls. For them, the new results should encourage paying attention to healthier lifestyle choices," says Maukonen. 28. How did Maukonen do research about people's risk of heart disease?

    Chris Thomas used to think of Facebook as just a platform to get in touch with his friends. He now believes the social networking service with saving his life. The 28－year－old was diagnosed with muscular dystrophy(肌肉萎缩症) nine years ago and has relied on a wheelchair ever since.

    On July 15，2015，Thomas was getting ready for bed in his apartment，when a shelving(架子) fell onto his wheelchair and knocked him over，causing him to fall and hit the back of his head. After waking up from a few minutes of coma(昏迷)，he realized he couldn't reach the string used to get the doorkeeper's attention.

    His phone was nearby and had the Facebook application conveniently open，so he posted a status update that immediately got his friends worried—even some he hadn't spoken to in years. “It was amazing，friends from six different states who didn't know each other were connecting with each other to get me help，” Thomas said. “Now that's the power of social media! You have hundreds of people at your fingertips.”

    Eight minutes after the status went up，an old friend，Leah，got in contact with Thomas' friend Brad，whose wife was in the neighborhood，and before you knew it there were 12 Facebook friends in his apartment，who took him to the hospital at once. They showed up to the rescue at the perfect time. Minutes before they arrived，Thomas thought he was going to have a panic attack，which he often suffers from because of his illness，but he's doing better now.

    “It felt good to know that my friends，even those I haven't spoken to in the past，came to save me，” Thomas said. “They all came together .I would've never imagined it.”

    Measles (麻疹) is only found in human beings. There is a highly effective and safe vaccine (疫苗) for the disease. So, in theory, measles could be destroyed.

    Yet the number of measles cases is on the rise.

    The World Health Organization (WHO) reports that, in the first three months of 2019, the number of cases is three times higher than it was last year. Africa alone has had a 700 percent increase compared to last year.

    The Democratic Republic of Congo reported 67,000 measles cases and 901 measles-related deaths in 2018. This year, WHO officials have noted more than 40, 000 suspected measles cases in the country. That number includes 284 measles-related deaths in the first weeks of 2019. Between September 2018 and February 2019, Madagascar reported over 67, 000 measles cases, including 828 deaths.

    Dr. Fauci, who directs the National Institute of Allergy and Infectious Disease in the USA, said that one in 10 children who get infected with measles will get an ear infection that could cause deafness. One in 20 would get pneumonia. One in a thousand would get brain swelling, and one to three per thousand would die. To say that measles is a slight disease is completely incorrect.

    Walter Orenstein is with the Emory University Vaccine Center in Atlanta, Georgia. He has spent his life working to end measles. Orenstein says possible effects of the disease are worse in poor countries. In those countries children are already at greater risk. They may be malnourished (营养不良的). They may have damaged immune systems. They may be underweight and may have no access to health care so measles is a big killer, he said.

    You have a 90 percent chance of getting measles if you have not been vaccinated and you come in contact with someone who has it. Dr. Rebecca Martin is the Director of the Center for Global Health at the U.S. Centers for Disease Control. She is working to remove measles from Africa completely. It is very infectious. It will find nearly everybody who is not protected against measles, Martin said.

    Health experts advise patients to get two treatments of the measles vaccine. U.S. health officials say educating parents about both the disease and the vaccine is an important step in stopping the spread. Equally important is making vaccination a top goal of health systems worldwide.

    When a driver slams on the brakes to avoid hitting a pedestrian crossing the road illegally, she is making a moral decision that shifts risk from the pedestrian to the people in the car. Self-driving cars might soon have to make such ethical (道德的)judgments on their own — but settling on a universal moral code for the vehicles could be a tough task, suggests a survey.

    The largest ever survey of machine ethics, called the Moral Machine, laid out 13 possible situations in which someone's death was unavoidable. Respondents were asked to choose who to spare in situations that involved a mix of variables: young or old, rich or poor, more people or fewer. Within 18 months, the online quiz had recorded 40 million decisions made by people from 233 countries and territories.

    When the researchers analyzed these answers, they found that the nations could be divided into three groups. One contains North America and several European nations where Christianity has been the dominant (占支配地位的)religion; another includes countries such as Japan, Indonesia and Pakistan, with strong Confucian or Islamic traditions. A third group consists of countries in Central and South America, such as Colombia and Brazil. The first group showed a stronger preference for sacrificing older lives to save younger ones than did the second group, for example.

    The researchers also identified relationships between social and economic factors in a country. They found that people from relatively wealthy countries with strong institutions, such as Finland and Japan, more often chose to hit people who stepped into traffic illegally than did respondents in nations with weaker institutions, such as Nigeria or Pakistan.

    People rarely face such moral dilemmas, and some cities question whether the possible situations posed in the online quiz are relevant to the ethical and practical questions surrounding driverless cars. But the researchers argue that the findings reveal cultural differences that governments and makers of self-driving cars must take into account if they want the vehicles to gain public acceptance.

    At least Barbara Wage, who heads a group working on autonomous-vehicle ethics at Audi in Ingolstadt, Germany, says such studies are valuable. Wage argues that self-driving cars would cause fewer accidents, proportionally, than human drivers do each year—but that people might focus more on events involving robots.

    Surveys such as the Moral Machine can help to begin public discussions about these unavoidable accidents that might develop trust. "We need to come up with a social consensus," she says, "about which risks we are willing to take."

    Professor Martin's report says that children who attend a number of schools, because their parents have to move around the country, probably make slow progress in their studies. There are also signs, says Professor Martin, that an unusually large number of such children are mentally affected.

    The professor says, "It's true, my personal feeling is that children should stay in one school. Our feelings are based on research and not on any personal feeling that I or many assistants may have on the subject."

    Captain Thomas James, an army lecturer for the past 20 years and himself a father of two, said, "I've never heard such rubbish. Taking me for example, no harm is done to the education of my children who change school regularly—if they keep to the same system, as in our Army school. In my experience—and I've known quite a few of them—Army children are as well-adjusted (适应) as any others, if not better. What the professor doesn't appear to appreciate is the fact that in such situations children will adapt (适应) much better than grown-ups."

    When this was put to Professor Martin, he said that at no time has his team suggested that all such children were backward or mentally affected in some way, but simply that in their experience there was a clear tendency (倾向).

    "Our findings show that while the very bright child can deal with regular changes without harming his or her general progress in studies, the majority (大多数) of children suffer from constantly (不断地) having to enter a new learning situation."