Hong Kong is one of the most densely populated  cities in the world, but with night skies around 1,000 times brighter than globally accepted levels, it gains a bad reputation for its light pollution. A study by Hong Kong University found that brightness levels in the southern Chinese city's popular shopping district of Tsim Sha Tsui were 1,200 times greater than the international dark sky standard. The crowded city of 7 million residents , full or residential high-rises, towering office blocks and neon  advertisements, has no laws to control outdoor lightning. The result is that light pollution is thought to be much worse than in other large cities, including London, Sydney, Tokyo and Shanghai. "In Hong Kong , you can't go anywhere outdoor in the evening without your eyes being blinded by this really disturbing outdoor lightning," the light pollution survey's head Jason Pum told AFP. "The fact that we have all this light in the sky means energy is wasted," he said, adding that too much artificial lightning also affects nightly wildlife. Research has suggested that light pollution can cause a number of harmful health effects in humans, including sleeplessness and headaches and can also interrupt body clocks and hormones . The university survey, the result of five million measurements taken from points across the city, was released just days before the start of the annual Earth Hour event, organized by the World Wildlife Fund. People around the world will be encouraged to turn off the lights for an hour on Saturday night to raise awareness of climate change. Last year, a number of Hong Kong's major buildings along Victoria Harbour went dark to mark Earth Hour. "Anyway, we should do our best to reduce the amount of lightning and adjust it for the benefit of the environment." .which of the following statements about too much lightning is NOT true? A) Too much lightning means a waste of energy. B) It can make the sky and the city more beautiful. C) It may have a bad effect on nightly wildlife. D) It can lead to some health problems.
B

A new satellite is travelling 1.5 million kilometers over a 110-day period to enter an orbit of the sun. It is called DSCOVR--the Deep Space Climate Observatory. It will replace a satellite that has been observing space weather. DSCOVR will begin its work during the worst of the 11-year-long solar cycle. This is a time when extreme weather on the sun can have the greatest effect on planet Earth. DSCOVR will gather information about a continuing flow of particles from the sun. We are protected from these particles by the Earth's magnetic field and atmosphere. But we are not fully protected from what scientists call Coronal Mass Ejections. These are strong storms that can happen on the sun's surface. Thomas Berger is the director of the Space Weather Prediction Center at the National Oceanic and Atmospheric Administration, or NOAA. He says these ejections are much more dangerous than solar particles. He says the Coronal Mass Ejections are extremely large magnetic clouds that are expelled from the sun at extremely high speeds. He says when they impact Earth, it is like a hurricane impacting Earth in terms of space weather. Violent space weather can make electric systems stop working. It can block satellite signals to Earth. It can interfere with radio signals and air travel. Mr. Berger says we cannot stop the ejections from affecting us, but we can prepare for them if we know when they will happen. When the DSCOVR satellite records an ejection, it will release a warning. Mr. Berger says the warning will provide NOAA about 15 to 60 minutes to let people know that a very strong storm is coming in to the Earth. He says that is enough time for power grid operators to take protective action. He says it is also enough time for workers to place satellites on a safe operating method if necessary. Mr. Berger says scientists would like even more time, of course. He says researchers are developing instruments that will give an earlier warning. The warnings from DSCOVR will be for the whole planet. But Mr. Berger says a new... How much time do people have to make preparations for the ejections  _  ? A) more than 60 minutes B) less than 60 minutes C) about half an hour D) between 15 and 60 minutes
D

Almost all theme park accidents can be prevented.Here, based on coverage of theme park safety, are some tips to help you and your family stay safe on your next visit. If you are visiting with a child, take a moment to explain the ride to them, and tell them what they should do.They are depending upon you to keep them safe.Set a good example for them by following the rules of the park, and make sure that they know you expect them to follow those rules, too. Tell them to stay seated, to hold the grab bar or put their hands in the laps, and not to stick their knees and feet outside a ride vehicle.Make them look to you for the okay to get on or off a ride, too.And never put a crying child on a ride.If your child starts to cry, let others pass you in line until your child is calmed.Or, gently _ the queue and find something more relaxing to do. Young kids can't keep an adult's pace in a theme park.Let them take plenty of breaks. "Kids get tired," said TPI reader Matt Johnson, a father of four."Tired kids make parents even more tired.And tired kids and parents may get hurt -- physically and emotionally." He advises that parents plan a mid-day break, perhaps a swim back at the hotel, to avoid mid-day heat and crowds."You will see cranky families having a miserable time while you are refreshed and having a great evening." If your child begins to cry just when he is going to take a ride, you should   _  . A) tell him to be relaxed B) make him share your interest C) give up the present activity D) encourage him to be brave
C

Are you feeling blue? An American study suggests that being surrounded by happy friends and neighbours could have more of an effect on your happiness than money.That is the finding of researchers from Harvard University and the University of California at San Diego.     Nicholas Christakis and James Fowler studied the emotional health of more than 4,700 people.They used information from the Framingham Heart Study.That study began sixty years ago in the American community of Framingham.Massachusetts.It was started to learn more about the risks of heart attack and stroke.          For the new study,the researchers examined the emotions of the men and women in the Framingham Heart Study.The information was gathered from 1983 to 2003.     The researchers found that friends of happy people had a greater chance of being happy themselves.That means that happiness spreads,or has a contagious effect,among people.And,the smaller the physical distance between friends,the larger the effect they had on each other's happiness.     Sadness was also contagious among friends,but not as much as happiness.The researchers say social groups did not influence happiness as much as personal situations.   However,people removed by as much as three degrees of separation still had an effect on one's  happiness.The expression three degrees of separation means the friends of an individual's  friends.     In fact,persons with three degrees of separation had a greater effect on an individual's   happiness than having five thousand dollars.The researchers say the study is historic because it shows that social effects on health can be spread among people.     Another finding is that people who work together or are married do not have as much of an effect on happiness levels as friends.The researchers say this is often true among friends of the same sex. The conclusion of the new study is_. A) the emotional health plays an important part in an individual's  physical health B) being surrounded by friends can bring happiness to all individual C) happiness can be spread and have an active effect on friends D) the physical distance between friends has no connection with happiness

C