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                                                       Be Careful about Energy Drinks
     Be careful what you drink; something that looks cool may not be good for your health.
     The weather is getting hotter and you'll be getting thirstier playing basketball or riding home from school.
A cold drink may be just the thing. But be carefu "I what you pour down your throat; something that looks
cool may not be good for your health.
     There are plenty of so-called energy drinks on the market. Most of them have an attractive color and
cool name.
     But after a careful check you may find that most energy drinks have high levels of caffeine. These drinks
are specially aimed at young people, students, busy people and sports players. Makers sometimes say their
drinks make you better at sports and can keep you awake. But be careful not to drink too much.
     Caffeine raises your heartbeat. Because of this, the Intemational Olympic Committee has limited their use.
The amount of caffeine in most energy drinks is at least as high as in a strong cup of coffee or strong tea.
     Research by Australian scientists has found that many teenagers are affected by caffeine. The results of
their study show that 27 percent of boys aged 8-12 take in more caffeine than their parents. There are hidden
health problems connected to energy drinks. Just one can of energy drink can make you nervous, have
difficulty sleeping and can even cause heart attacks.
     "Teenagers should not be encouraged to have drinks with high level caffeine in them," a scientist from
the Australia Nutrition Foundation said.
1. Are all the drinks that look cool good for health? 
    _________________________________________________
2. What kind of drinks has high level caffeine?
    _________________________________________________
 3. Who are these drinks for? 
    _________________________________________________
4. Who made the research on the drinks with high levels of caffeine?
    _________________________________________________
5. Why should teenagers not be encouraged to have drinks with high level caffeine in them? 
   _________________________________________________
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The first Earth Hour was held in 2007 in Sydney, Australia when 2.2 million individuals(个体) and more than two thousand businesses turned their lights off for one hour to take a stand against climate change. Only a year later Earth Hour had grown into a global event with more than 50 million people across 35 countries and territories(行政区)participating(参加). Global landmarks such as the Sydney Harbour Bridge, CN Tower in Toronto, Golden Gate Bridge in San Francisco, and Rome’s Colosseum, all stood in darkness, as symbols of hope for a cause that grows more urgent(紧急) by the hour. In March 2009, millions of people took part in the third Earth Hour. Over 4000 cities in 88 countries and territories have promised their official support for the event. On Saturday 27 March, Earth Hour 2010 became the biggest Earth Hour. A record said 128 countries and territories joined the global display of climate action.
The event is organized by the World Wide Fund for Nature, also known as the WWF. The organizers say climate change is one of the greatest threats(威胁) facing wildlife and nature. They also say when it comes to save energy and money, big changes start with small steps like turning out the lights. Now people are all joining together in a global effort to show that it’s possible to work on global warming. Earth Hour has brought about some new changes to our lives. People join in activities such as candle-lit dinners and star-gazing parties as a response to the call for "going dark".

This year , Earth Hour is asking people to take the next step and go beyond one hour. So if you haven’t done so, next year, late half past eight to half past nine, let us turn off the lights for one hour for the environment! Earth Hour is a call to stand up, to take responsibility(责任) and to get involved(与……有关) in working towards a better future. Earth Hour is a message of hope and a message of action. Everyone can make a difference. 
【小题1】What’s the main idea of the passage?                              
A.The climate change is one of the greatest threats facing wild life and nature.
B.Everyone can make a difference.
C.Earth Hour has brought about some new changes to our lives.
D.Tell the source(起源) of Earth Hour and its importance.
【小题2】The underlined word “global” in the passage means “________”.
A.全球性的B.地域性的C.官方性的D.海洋性的
【小题3】 Which of the following is not true?
A.The first Earth Hour started in 2007 in Australia.
B.Earth Hour is hold to reduce the bad effect on climate.
C.The writer thought that big changes start with small steps.
D.More than one hundred countries and territories supported the action last year.
【小题4】The best title of the passage is_________________.
A.the WWFB.Earth Hour in Australia
C.Climate ActionD.Earth Hour
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