Do you want to live another 100 years or more? Some experts say that scientific advances will one day enable humans to last tens of years beyond what is now seen as the natural limit of the human life span.

"I think we are knocking at the door of immortality (永生),” said Michael Zey, a Montclair State University business professor and author of two books on the future. "I think by 2075 we will see it and that's a conservative estimate (保守的估计)."

At the conference in San Francisco, Donald Louria, a professor at New Jersey Medical School in Newark said advances in using genes as well as nanotechnology (纳米技术) make it likely that humans will live in the future beyond what has been possible in the past. "There is a great push so that people can live from I20 to 180 years," he said. "Some have suggested that there is no limit and that people could live to 200 or 300 or 500 years."

However, many scientists who specialize in ageing are doubtful about it and say the human body is just not designed to last past about 120 years. Even with healthier lifestyles and less disease, they say failure of the brain and organs will finally lead all humans to death.

Scientists also differ on what kind of life the super aged might live. "It remains to be seen if you pass 120, you know; could you be healthy enough to have good quality of life?" said Leonard Poon, director of the University of Georgia Gerontology Centre. "At present people who could get to that point are not in good health at all."

1. By saying "we are knocking at the door of immortality", Michael Zey means _______

A. they believe that there is no limit of living

B. they are sure to find the truth about long living

C. they have got some ideas about living forever

D. they are able to make people live past the present life span

2. Donald Louria’s attitude towards long living is that _______.

A. people can live from 200 to 300

B. it is still doubtful how long humans can live

C. the human body can last forever

D. it is possible for humans to live longer in the future

3. The underlined "it" ( Paragraph 4 ) refers to ________.

A. a great push

B. the idea of living beyond the present life span

C. the idea of living from 200 to 300 years

D. the conservative estimate

4. What would be the best title for this text?

A. Living Longer or Not              B. Science, Technology and Long Living

C. No Limit for Human Life       D. Healthy Lifestyle and Long Living

 

What’s your dream vacation? Watching wildlife in Kenya? Boating down the Amazon? Sunbathing in Malaysia? New chances are opening up all the time to explore the world. So we visit travel agents, compare packages and prices, and pay our money.

  We know what our vacation costs us. But do we know what it might cost someone else? It’s true that many poorer countries now depend on tourism for foreign income. Unfortunately, though, tourism often harms the local people more than it helps them.

  It might cost their homes and lands. In Myanmar, 5,200 people were forced to leave their homes among the pagodas(佛塔)in Bagan so that tourists could visit the pagodas.

  Tourism might also cost the local people their livelihood and dignity. Local workers often find only menial(卑微的)jobs in the tourist industry. And most of the profits do not help the local economy. Instead, profits return to the tour operators in wealthier countries. When the Maasai people in Tanzania were driven from their lands, some moved to city slums. Others now make a little money selling souvenirs or posing for photos.

  Problems like these were observed more than 20 years ago. But now some non-government organizations, tour operators and local governments are working together to begin correcting them. Tourists, too, are putting on the pressure.

  The result is responsible tourism, or“ethical tourism.”Ethical tourism has people at its heart. New international agreements and codes of conduct can help protect the people’s lands, homes, economies and cultures. The beginnings are small, though, and the problems are complex.

  But take heart. The good news is that everyone, including us, can play a part to help the local people in the places we visit. Tour operators and companies can help by making sure that local people work in good conditions and earn reasonable wages.

  They can make it a point to use only locally owned hotels, restaurants and guide services. They can share profits fairly to help the local economy. And they can involve the local people in planning and managing tourism.

  What can tourists do? First, we can ask tour companies to provide information about the conditions of local citizens. We can then make our choices and tell them why. And while we’re abroad, we can:

  ★Buy local foods and products, not imported ones.

★Pay a fair price for goods and services and not bargain for the cheapest price.

★Avoid flaunting(炫耀) wealth.

★Ask before taking photographs of people. They are not just part of the landscape! Let’s enjoy our vacation and make sure others do, too.

1.What is probably the best title for the article?

A.Tourism Causes Bad Effects  B.Tourism Calls for Good Behavior

C.Vacations Bring a Lot of Fun D.Vacations Cost More Than You Think

2.The underlined phrase“take heart”means“   ”.

  A.pay attention B.take care C.cheer up  D.calm down

3.According to the passage, the writer thinks   .

  A.tourism is not a promising industry.

  B.dream vacations should be spent abroad

  C.the problems caused by tourism are easy to settle.

  D.tourists should respect local customs and culture

 

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