根据短文内容选择最佳答案。

　　Many children love to play with snow in winter．But Long Chuan has come to hate it．

　　This year his hometown suffered from snowstorms(遭受暴风雪)for nearly a month．The heavy snow stopped cars and trains, broke the electricity(电)tower and turned tap water to ice．

　　Every day Long Chuan had to walk several kilometers to carry drinking water．“I couldn't ride a bike and it took me 3 hours to walk to school．I can't remember how many times I slipped(滑倒)on the hard ice,”said Long Chuan．

　　Long is not alone．This year millions of people in central and southern China had a freezing winter without enough water and electricity．The biggest snowstorms in 50 years killed more than 100 people．They also cost the country 111.1 billion yuan．

　　Experts(专家)say a special type of climate condition(气候条件), La Nina, caused the storms．During a La Nina, the water in the Pacific Ocean(太平洋)near the equator(赤道)becomes colder than usual．It changes the weather around the world．

　　Besides China, Canada, the US and Middle Eastern countries also met with heavy snowstorms this winter．The special climate caused the recent flooding(洪水)in Australia, too．

　　However, experts say that people have destroyed the environment(环境)．Global warming(全球变暖)may be causing these terrible weather events to happen more and more often．

(1)

(2)

(3)

(4)

(5)

　　Many children love to play with snow in winter．But Long Chuan has come to hate it．

　　This year his hometown suffered from snowstorms(遭受暴风雪)for nearly a month．The heavy snow stopped cars and trains, broke the electricity(电)tower and turned tap water to ice．

　　Every day Long Chuan had to walk several kilometers to carry drinking water．“I couldn’t ride a bike and it took me 3 hours to walk to school．I can’t remember how many times I slipped(滑倒)on the hard ice,”said Long Chuan．

　　Long is not alone．This year millions of people in central and southern China had a freezing winter without enough water and electricity．The biggest snowstorms in 50 years killed more than 100 people．They also cost the country 111.1 billion yuan．

　　Experts(专家)say a special type of climate condition(气候条件), La Nina, caused the storms．During a La Nina, the water in the Pacific Ocean(太平洋)near the equator(赤道)becomes colder than usual．It changes the weather around the world．

　　Besides China, Canada, the US and Middle Eastern countries also met with heavy snowstorms this winter．The special climate caused the recent flooding(洪水)in Australia, too．

　　However, experts say that people have destroyed the environment(环境)．Global warming(全球变暖)may be causing these terrible weather events to happen more and more often．

(1)

(2)

(3)

(4)

(5)

阅读理解

　　In choosing Steven Chu as his energy secretary(能源部长), Barack Obama has chosen one of the most prominent U．S．scientists of using science to deal with global warming(全球变暖)．

　　Steven Chu was born in St．Louis, Missouri, in 1948．His father was a college teacher．At that time, they were only the third Chinese family to live there．In high school, Chu played tennis and was on the school club．He took his first physics class in his senior year at Garden City High school and became interested in it．

　　Steven Chu got his first doctor’s degree in maths and physics in 1970．Then he went to California for another doctor’s degree．In 1978, Chu worked in Bell Lab where he developed ways to cool and trap atoms using a laser(用激光冷却和俘获原子)．In 1997, he got the Nobel Prize for physics for this．He left Stanford in 2004, after he was made head of the Lawrence Berkeley National Lab in California．As the head of the national lab, Chu has tried to find scientific ways to climate c hange and soon become a member of the Climate Council working for a new global climate treaty(气候条约)for 2009．

　　He also insists on the need to end the unnecessary waste of energy．“If I were King of the world, I would spend the next ten years on energy efficiency and conservation(节能和环保)．”he said last year．

　　On December 11^th, 2008, Barack Obama made him energy secretary．He would be the first Chinese-American to run the department of Energy and devote himself to sustainable(可持续发展的)energy．

(1)

(2)

(3)

(4)